Bmw dpf pressure readings. My girlfriend has a E91 318D with a DPF fault code.

Bmw dpf pressure readings Dpf and fuel system. So, I spent some time driving around with Carly today. My reasoning is that I can't see how the first sensor could measure pressure before the DPF given that the turbo is bound to change the pressure. The codes are 452A and 4D4A. 3g after the regen. the car regens approx every 300 miles, but it regens from 21g soot down too 8g soot and then stops?the figures i have at the moment are oil/ash 11. At ignition on/engine off and cold exhaust they should read really could be the sensor is reading absolute pressure and not gauge pressure. What are your pressure readings? Tonight I had 37g In most cases, we've found that the issue stems from interrupted regeneration cycles, clogged DPF sensors, or faulty exhaust temperature sensors. Call for FREE help and advice. The car can't measure the weight of the soot or ash, it is calculated it based on the pressure sensor readings, miles driven etc. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and hello friends. 2009 bmw x5 35d M57N2 engine 132k miles A forum community dedicated to BMW owners and enthusiasts. What causes a P2455 code? The P2455 code typically arises from issues with the Diesel Particulate Filter (DPF) pressure sensor. 2: check hoses to DPF from the sensor for leaks. The car runs just fine. 300-350hPa that would require replacement of the DPF to rectify driveability concerns. Here are the screenshots. Anyway, as you may already know I have got my back pressure sensor, EGT senor all changed and have had my dpf professionally forced regenerated including once at BMW. good morning guys, i have a (uk) 2010 golf 1. At the start of this year it had the EGR Valve fixed under a manufacturer recall. I've been dropping t15 bits, mine and my neighbors down into the splash cover along with the magnet. Despite the aforementioned, I am still throwing codes (4CF3, 4D01, and 4D99) and have a CEL. 2011 116d SE 5dr, Space Grey. Your pressure readings are within what you would expect to see so would be surprised if the pressure sensor is the issue. Jump to Latest I think the PID is called 'soot concentration' which is a derived value in mg. Location: Edinburgh. This could cause wasted time and money if a new DPF is purchased as a result, and then still found to show incorrect pressure Forum for BMW 1-Series 3-Series 5-Series 7-Series M3 M5 M6 Z4 X1 X3 X5 X6 Z2 Z4 325i 330i 335i 535i 550i 755i BMW Forums. After cat stabilized at 475-500F, the DPF pressure (PSI) is roughly RPM/1000. Common Causes The Carly app, or the car, calculating the soot gram amount is based on a variety of pressure numbers, and distance the car has travelled etc, so its probably more indicative of absolute pressure in the DPF, and not literally soot. Or there is a problem with the interconnecting hose. On mine they don't seem to vary much with engine revs. No way that was real, so I assumed the part was shot, and I was correct. Thanks for the info my readings are similar, I did do oil change myself just in case someone been using wrong oil as I recently bought the car, on the force regeneration it idles at 1400 rpm which is way more than normal idle which is about 800 rpm, I know the car is meant to do regeneration after 100% soot fill level and at 200% the engine Took to BMW master tech, he suggested a DPF cleaner that we spray directly onto the DPF - we used normfest. I have recently seen the fault code 4667, which relates to too frequent regenerations. X 5 2007 - 140k. I've seen BMW's "Max Permissible" measurements of 65 mBar at idle, & 150mBar at 2K RPM; my readings are WELL below this, but would be interested to know what others are getting. com - Online BMW Parts Catalog dpf differential pressure sensor hoses identified I have called BMW service and they say that DPF is at end of lifespan. I've seen back pressures as high as 2070 hPa (30 psi) and differential pressures as high as 63 hPa (0. After some reading around here and XO, it seems premature to worry until the vehicle stops regens and/or throws codes specific to the DPF being at end of life. 04hPa (-19mbar), picture in attachment. Preface: I was having an issue with the pressure reading throwing a 4D00, 480A, and 481A code. The vehicle then ran fine for about 197km then the background regens kicked in (no light on dash) and these were occurring every 1-16km according to Multiecuscan, which is when I get white smoke bellowing 2010 BMW Z4 sDrive35i DKG | 306 HP / 400Nm | Space Gray | Photo album. the A DPF with a pressure drop characteristic that provides a back pressure of 15 kPa at rated speed and full power would not result in significant performance degradation at full load for all engine speeds for this particular engine. I`m lucky I caught this when I did. Also if your filter was really dirty, you will notice a little bit of smell. Replaced them myself took car for a burn on motorway, dpf regen took place. Both pressure readings change constantly, along with the temperature readings. Tags dpf. If your voltage differs greatly or the pressure values do not match the voltage reading, the DPF differential pressure sensor is faulty and will need to be replaced. 2. We have lots of experience with dpf problems and have BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > How to check DPF Ash Level, Pressure using INPA Thread Tools: Search this Faulty Sensors: Malfunctioning DPF sensors can make your engine run outside the ideal conditions for the DPF, potentially causing clogs or, in the worst case, damaging your BMW. 2 psi). The problem I have is that research on REAL. Joined Jan 30, 2024 · 3 Posts DPF gaskets BMW want around £11 each for the 4 DPF gaskets so I went looking elsewhere (sorry Ed). F40Model Year: 2019 + Previous Generations; F20 / F21Model Year: 2012 - 2018. e. 5mbar at idle. A C110 will give you the DPF back pressure reading, I take it at idle, and 2,000 rpm, ideally you should get around 30mb if the DPF is in good order It's coming up because it sees the RPM increase, knows that the exhaust gas volume is increasing, and yet thinks that the differential pressure across the DPF isn't rising. Any help appreciated. The differential pressure data is used to determine when a DPF regeneration is needed. I have run, DDE measure value and diagnosis Scan using ECU Functions. The DPF wouldn't work without that. Though I have heard good things about "Wurth" DPF cleaner, Which actually gets sprayed into the post DPF pressure sensor hole. Wales or Cheshire. SCR efficiency is a conclusion based on ineffective addition of presumed proper DEF. 200mbar) After regeneration: Pressure at Idle: 15mbar Pressure at 2000rpm: 53mbar Pressure at max revs: 103mbar BMW DPF Blocked? Hi all, I have a 2015/65 (UK) BMW 120D (F20) with 43k miles. 756 mbar. I got it checked again was told it was “83% blocked” and they said it would have to be My girlfriend has a E91 318D with a DPF fault code. This pressure should not exceed 100hPa at Idle. If the thing is too badly bunged up the car will never run right. 1. We do not need to replace the DPF, saving ££££. The DPF ash is fully reduced chemically at very high temperatures, equivalent to very strong chemical reducing agents, the strongest that there are The fault is detected when the difference between the exhaust gas pressure before diesel particulate filter and the ambient pressure is greater than a limit value. That was also showing a reading. Generally speaking, the pressure differential is measured by a single sensor, rather than 2 separate pressure sensors (however that configuration is possible). 00 hPa Filtered differential pressure of the particulate filter = -10. iTrader: I cant Metzger 0906185 exhaust pressure sensor. A forum community dedicated to BMW owners and enthusiasts. I also don't want to go down a rabbit hole of attempting to fix the issue. Unfortunately @n1das is 150 days in the Shadowland. P2534 – Swirl Flap Actuator (specific to some BMW The exhaust dpf pressure sensor reads in milli bar. BMW 5 Series - Tech Talk For All Gen Of 5 Series Back pressure pre DPF. Should still be plenty of life of the DPF (43g ash). The problem I'm running into now is exhaust back pressure sensor codes (among others): A forum community dedicated to BMW owners and enthusiasts. 0118 321 7418. Great thread and I am reading over the provided file closely. yes what your seeing is the pressure differential across the dpfas too the location of the pressure tube Can I ask how you clear those figures. thanks Firstly a pressure reader was plugged into my DPF pressure sensor tube, it sits above the DPF and can be seen going into the small electric cradle where the sensors plug into. This showed that the DPF was clogged badly. This is on both Carly readings - the "exhaust gas temperature upstream particulate" as well as "exhaust gas temperature sensor position". DPF soot is reduced at 600ºC and there is no commodity chemical equally strong reducing agent. Join Date: Sep 2012. Now being the car relatively low mileage might not be a clogged DPF. So As long as your back pressure readings are ok, it can be reset in Ista. E81 / E82 / E87 / E88Model Year: 2004 - 2011. 452A- DPF remaining distance soon reached 4530 - Charge pressure control high pressure stage 48DC - Charging Pressure Sensor, Plausibility 4C83 - Exhaust Pressure Before Turbocharger, Plausibility 3F25 - Charge-Air Tube Monitoring 4B82 - Exhaust-Gas Recirculation-Rate Control, Control Deviation 4862 - Air System, Air to EGR Mass Flow, Plausibility Most of the BMW's we repair tend to have faulty or clogged DPF sensors or glow plug errors lodged in the ECU. Location: Boulder, CO. Unless the DPF is extremely fouled , it should be able to burn off the build up. Put everything back together now I have a code 4530 "Charging pressure control high, high pressure stage, control deviation. Single differential pressure sensor with hoses to measure pressure before and after the DPF ; Two absolute pressure sensors, one pre-DPF and one post-DPF; The powertrain control module (PCM) monitors the pressure readings and triggers code P244B when the difference exceeds a calibrated limit, indicating a restricted DPF. There is even a BMW part number for the DPF cleaner, which is just some BMW rebranded DPF cleaner. Jump to Latest 21 - 26 of 26 Posts. 6-10 hPa at idle. I have taken this car on multiple long drives on 2. For VW and Audi vehicles, we've had success clearing the code by performing a forced DPF regeneration using VCDS. Many thanks to all that post their problems and solutions. I’m also experiencing a strong smell (diesel) when the AC/heat A DPF pressure sensor is vital to the longevity of the DPF, and if the DPF becomes completely obstructed, the regeneration process will not fix it. What DPF pressure should I be expecting? Negative DPF back pressure? Hey guys, have a diesel BMW 520d. We did a Here are my Intake Manifold Pressure (MAP) readings on start up under varying rev ranges for ref: 0 Rpm (4 C): 102 kPa (30 inHg) - car not started but key position ON Having changed both my thermostats with BMW original stats, the 2nd of which was only done yesterday, my test with mostly motorway driving and A roads with some town driving BMW DPF 245700 25E200 24CF00 Particulate Filter Heavily Clogged Exhaust Back Pressure Air Mass Meter. and used some sort of additive injected into the differential pressure fitting at the top of Could I please know how do I find soot and ash levels for DPF using ISTA +. G42Model Year: Just an update so had car terracleaned. Pressure test showed dpf empty car still running in limp mode I bought a back pressure sensor and flow plug relay both used on eBay total about 50 pounds 70 euro. I did the DPF reset function in ISTA and after that the ambient pressure So I thought I'd have a look at live data and check the DPF pressures, haven't done a proper test yet as I didn't want to sit on the drive revving my car to 4k rpm but at idle Back Active regen happens when "required" by the ecu, usually judged by DPF pressure. 4-3. The soot and ash mass are estimated from models. (49k miles current) AT the very least get the thing plugged in and get a reading of the DPF back pressures. 97 to 1. 6 blue with 45,000 miles. There is no "particulate" sensor but there are a pair of pressure sensors used to measure the differential pressure across the DPF. 6 tdi , i have run a full diagnostic and its all clear, the problem i have is with the dpf readings /functioning. At that point they said the pressure was reading at 40mb but on the carly it was over 1000 mb. Join Date: Dec 2020. BMW Garage: BMW Meets: Register: Today's Posts: Possibly the one to measure pressure across the dpf. What's the best way to do a "reset"/DPF replacement with ISTA-D, considering everything is running fine? Additional info: The car 2012-2015 BMW 3-Series and 4-Series Forum. BMW 3 Series - Tech Talk For All Gen Of 3 Series DPF and 15 psi back exhaust pressure. 04°C and differential pressure -19. 01. It didn't show coding II (it shows as grey) so I used the UDS Protocol. Come join the discussion about Bimmerfest events General BMW Discussions. Jump to Latest 13K views Or a little slit in the dpf pressure sensor tube to fool the readings to allow the temperature be maintained? Save Share At idle (770 rpm): exhaust back pressure 1201 hPa (17 psi); DPF differential pressure 12 hPa (0. At 3,000 rpm, I have 2. 41( native with just diagnostic function) with a k+dcan cable. pay close attention to your exhaust pressure sensor readings. I was able to select "Select Adaptation of diff. I know the car is regening and is capable of regening because the back pressure measures ~12mb idle and ~150mb at 4000 revs (more than acceptable results) when the regen has taken place using the method above (and the back pressure A custumer brought in a BMW 325 Sport Diesel, complaining of poor performance, bad fuel economy and a history of DPF problems. Location: S. 5 g ---soot calculated 13. It regens as it should The only thing I can't confirm is whether the dpf has been cut out, though I'd expect the back pressure to be . At 2910 rpm: exhaust back pressure 1750 hPa (25 psi); DPF differential pressure 43 hPa (0. Still have this high back pressure, reading some posts any chance linked to EGR Control Valve? 0396414. 100mbars cruising at 60mph, and about 800mbars when thrashing it The club is not part of BMW nor affiliated with or endorsed by the offical BMW AG in any way. Discover all this: Hi, what is the live reading of your DPF back pressure, both at idle and at higher revs? BMW diesel). 989 bar with no pressure hose connected. I bought new sensor, tried all like before and weird pressure is still 756mbar ( even when i unplug DPF hose ) Car was bought from BMW dealer in 2019. because of the counter reaching the maximum limit set by BMW for the DPF life. BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > DPF Differential Pressure Sensor - Consensus Google Search Search Forums BMW introduced DPF – Diesel particulate filters around 2004 and eventually phased them in to the entire diesel range. iTrader: Is the carly reading in absolute pressure or gauge, i. When the back pressure sensor sees around 250mb it will cause the dash to show a yellow dpf 1/2 light Don't use a lower gear or hold the revs up at 3000 rpm (this will stop the dpf regeneration ) BW chiptune Tuning BMWs since 1991. I used a BM500 from ebay or Amazon for my 116i. com is a private enthusiast site not associated with BMW AG. That would give a better picture. My idle back pressure was 4 PSI and above 10 under load, I couldn't believe this. We offer numerous While a clogged DPF itself doesn’t directly cause P2455, it can lead to abnormal pressure readings that might trigger the code. With BMW diesels, replacing the DPF pressure sensor often resolves the issue. Soot Mass is a function of Back Pressure, or if the pressure sensor is not connected, the Back Pressure and Soot are derived from a model. It should in theory be knackered seeing as the vast majority of journey's consist of 10 mile runs where it barely warms up. This component monitors backpressure in the So if the DPF reading is say 90% and a regen doesn't take the % down a significant amount then the DPF is beyond fixing. Join Date: May 2019. ISTA also claims last DPF-regeneration was 1500km ago. But I'd still suggest further investigation, it could be the DPF but it could be a pressure sensor. It is normally bolted to the side of the engine or attached near the firewall at the back of the engine compartment. also did you take a look at the exhaust gas back pressure readings (upstream and downstream of the DPF) - would be especially interested in what you see for those ones. Made a ton of progress recently chasing DPF issues found consistently low engine temps, replaced the thermostat and started getting regular regen cycles. 01 bar DPF Differential Pressure Sensor (at 3000rpm) = 0. Hope your weekend is going good. Interestingly the frequency it pegs to 95 seems to change with ambient temperature (pegging almost 50% of the time when greater On our first test drive, the vehicle did have symptoms of a blocked DPF – sluggish performance and raised DPF differential pressure sensor readings. Although this is a kombi I have problem with DPF filter sensors. 6 psi). Opel / vauxhall being blank off but any of you blanked of the BMW & kept the car for a good number of yrs after the blanking. Come join the discussion about 1) Soot mass is a function of DPF exhaust pressure so either the DPF is truly blocked or the Pressure sensor is reading falsely. Planned lifespan is 250. Successfully forced regeneration and got from 60g down to 0. Its running fine but just want to have a look at the condition of the particulate filter by checking the back pressure. The exact same reading, all the time. These readings are from 4 years of driving experience in the urban jungle. Fuel rail pressure: obviously fluctuates normally 8k psi, full throttle 22k psi Coolant temp: 180ish. 0d, when you are at WOT the pressure before the DPF peaks at around 480mbar. How to replace a faulty DPF differential pressure sensor. and also P14a3 (Implausible DPF pressure) have appeared. I confirmed this reading with both tools!!. I have been trying to regenerate through ISTA+ without any luck. A forum community dedicated to BMW owners and BMW 5 Series - Tech Talk For All Gen Of 5 Series. Location: Melbourne, Australia. Quote 11-28-2019, 01:29 AM They have checked all the sensors, pipes - New ECU map is wrong, either for measuring back pressure or DPF regeneration - Faulty DME/wiring affecting the pressure sensor readings (i. Note that the DDE unit will not allow forced regeneration to take part Sorry I don't know the values but if the dpf is very clogged up, this might explain the high reading, or it could be the sensor. When I say the Exhaust Gas Back Pressure is negative. When this happens, you will notice slightly higher temperatures as well as reduced MPG. strange negative dpf back pressure reading?? Bimmerpost ☰ Model Selection. This often means that vehicles taking regular short trips experience a rapid build-up of soot particles and debris, which blocks the DPF filter. Appreciate 0 Tweet. I replaced both the exhaust sensors ( one in manifold and in the dpf filter) with no change in readings. I've been reading lots of posts regarding several issues with the dpf and regeneration process although I cannot for the life of me figure out what is wrong. 00146959,0,5,psi,Auto My DPF Pressure reading vacillates between reasonable/plausible values and 95 PSI while driving. There is no need to panic and no need to do anything yet because these are information only codes about the DPF's remaining life. iTrader: When the engine stops it only has seconds for the DPF pressure sensor to match the reading of the intake manifold pressure sensor. and inaccurate air pressure readings (relevant for EGR flow calculations). However it could be that the upstream sensor gives an inferred reading when the DPF sensor is NOK Pressure reading: A typical EPS scanner reading for pressure may be approx. 38mBar. Mine was checked recently and showed 2. E60 530d dpf help please. 5 years old with 47k on the clock, FSH etc. I needed to check if it was indeed blocked and the first back pressure reading showed exhaust gas back pressure at 940m/b at 2,000 rpm. On the drive home the Mini seemed more like her normal self again. This week I have had a full engine software update to the latest bmw programme and reset the dpf so the car thinks it's got a new one fitted and still have the issue. Location: France. Before replacing a faulty DPF differential pressure sensor, consult the manufacturer’s service manual for instructions P2453 is a generic powertrain code that applies to all diesel vehicles equipped with a DPF system, regardless of make or model. Drives: Bmw 325d E91. 0 Diesel Turbo. there is likely to be some soot buildup fallout. just wondering how can i measure the dpf back pressure on my 2009 e70 X535D. 318d 2011 · Registered. 02318. Idle Speed 70. It seems an active regen will not occur in this situation - I think this is what is meant BMW 6 Series - Tech Talk E24,E63,E64,F12,F13 635D DPF Woes. 8 bar is a massive pressure and the engine would not run and It certainly would not boost. AVI_8. Or seems to anyway so I haven't changed it. After getting repeated risk of particle filter blockage warnings Diagbox showed 13 - 40mbar at idle. They obtain the pressure by tubes to either side of the filter. Did some diagnose test on ISTA+. DPF Cleaning service available in and around the Reading. It looks like BMW has a version of this cleaning as well but I like the Liqui Moly better because the BMW is sprayed down the DPF pressure sensor pipe vs Liqui Moly directly into the filter in the direction of exhaust. What Are the Indicators of a Faulty DPF? Should your BMW’s DPF start to have problems, you might notice these signs: Exhaust Pressure Sensor: $213. Firstly check the pipes that connect to the pressure sensors to make sure they are not perished or split. xx PSI. 0-0 BMW 435i DPF Pressure 0-0 BMW 435i Turbo Drive Pressure 0-0 BMW 435i Fuel Rail Pressure Commanded 0-0 BMW 435i Fuel Rail Pressure Scott,thanks for the reply,ok I understand now I just looked at your car profile and jumped too the wrong conclusion ,sorry. Also the Liqui Moly is a 2 part solution vs. Second Lieutenant . Finally you can not force a regen on a bmw. High-pressure EGR appears to I have a 2010 1. The back pressure readings before and after were as follows: Before regeneration: Pressure at Idle: 130mbar (max. 0 egr exhaust control. this should give a indicator of DPF life (from other reading I have done) if that sensor was present. 89 Differential Pressure Sensor: $63. Knowing that the dpf could be a problem on diesels I choose under DMe diagnosis the back pressure exhaust reading and was surprised to see -999. DPF_LOAD with an L for LIVE, ie based on actual measured differential pressure BMW 1 & 2 Series General Discussion. Solving a blocked DPF by unblocking it, Yes as far as I know back pressure is measured and when it reaches a certain level a regen is triggered . 1st Gen. In addition it has had loads of diagnostics done and BMW 2009 335d - CBU and DPF. Also get the DPF soot and ash levels checked. 10 bar Fill level of DPF = 78% Soot content of DPF = 5g Ash Content of DPF = 1g Total distance at last correction of ash content = 61694Km Now I have just noticed that the exhaust back pressure is running at 1050mbar on tick over! (about 16psi?). Anything close to 3 is looking at clogged DPF. 4g??. Dyno Dynamics rolling Have been troubleshooting DPF issues in my e70 X5d ever since the BMW dealership quoted me ~$6k to fix it. Reading. Hi all, good morning. . At first I thought my BMW was a bit underpowered but figured this was just the difference between a smaller lighter 2. Last edited by stormlv; 03-18-2016 at 06:37 PM usually judged by DPF pressure. I recently had a My bmw X6 e71 2008 turbo diesel, the back pressure sensor show good when cold or early morning when i startup the car but while driving for around 30mins , while driving i can see from bimmertool the DPF back pressure sensor increased to around 19mbar even at traffic stop. So I asked them to regen it agsin as they hadn't done it properly. I thought if the dpf was 0 then back pressure should drop too. They send them home with a tech that does a motorway journey. Pressures did get better but now, when I start the car cold, at idle I am getting negative I just ran smooth running and DPF pressure test but there are few more different tests we can perform. He then re-tested it (clearing the codes) and all was well no codes, but when he checked the idle status it was moving from 0 to 8000 and continually, when he rev'ed the car it showed the expected results. I think the BMW technician might have said it dropped as the engine speed went up, but still a very Checked the DPF ash and soot mass, but that seems normal as far as I can tell. The dealer simply offered to replace it for like $600. I used ISTA+ to diagnose, and found the backpressure values to exceed the target significantly. Passive regeneration refers to the process of automatically cleaning diesel particulate filters (DPF) by oxidizing and burning off accumulated soot during normal driving conditions, without the need for active intervention by Two BMW specific codes are stored and won't clear until the DPF life is reset after replacing the DPF. View Single Post 11-06-2014, 04:18 PM #2: ade146. Cool). Took it my regular indie and he says the code says the DPF is at end of life and has recommended a replacement. I am wondering if this could be a sensor or if i should just do a DPF-delete. The low-pressure EGR taps the exhaust gas downstream to the DPF, also has a cooler and dumps the exhaust gas upstream to the twin turbos. Oh well, on the positive side, regens now appear to be working again. Values posted below: MIL light is on with P2459 code. You probably need a BMW diagnostic tool which will tell you how full the DPF is and also whether the sensor is faulty. Jump to Latest Mine turned out to be a faulty DPF back pressure sensor . 12 and started looking for someone to clean my DPF locally. 5 PSI. before DPF -0. View Single Post 11-09-2014, 02:34 PM #7: old grey steve. 02. I have a 2012 F01 730d bought approved used from a BMW dealer. There will be difference in back pressure readings with LCi & pre-LCi vehicle because of DPF location. By Dayo, November exhaust back pressure is reading 35mbars at idle, 60-70 when reving in neutral. 0 mbar back pressure reading. Posts: 4 Thanks for the good reply. Colonel The 3 readings above confirm the usual 480A & 481A DPF fault and Exhaust Back Pressure faults, sadly all too common. Damaged or blocked pressure pipes can produce incorrect readings on the DPF pressure sensor, which could therefore lead to problems if undetected and unresolved. After some time i got msg on diagnostic that exhaust backpressure sensor is faulty. I struggled to find the oil - ash numbers using FORSCAN or anything else. The My back pressure readings are very low considering I haven't touched the dpf in almost 3 years of ownership. Charging pressure to low/positive control deviation". 1 part for BMW. You would normally measure dpf pressure in mb. 0 Petrol Turbo and a heavier 2. OEM lists two exhaust pressure sensors, one before the turbo, and another at the DPF. 3 hours and the screw is not off. pressure sensor particulate filter" and did that but If you notice frequent regeneration cycles occurring more than usual, this points toward potential issues tied to DPF pressure readings and warrants further investigation. 9 psi). 7g soot all seems good I have a problem with DPF regeneration. The 3 readings above confirm the usual 480A & 481A DPF fault and Exhaust Back Pressure faults, sadly all too common. PowerX Garages Ltd . They have one in my dealership for around £65 GBP. Shortly after the light came back on and the code was “Exhaust Back Pressure/DPF”. The BMW name, marks, M stripe logo, and Roundel logo as A forum community dedicated to BMW owners and enthusiasts. DPF, he then cleaned it and put the dpf back onto the car. Join Date: Aug 2014. As you can seewhen looking at the back pressure result below it was non too promissing. When you install it, the ash reading, I believe, will be the Only then I started reading about dpf's and egr's and to be honest I am terrified. As far as I know the 480a code is back pressure too high and is the pre cursor to code 481a. 9 mbar 2000 rpm - 259 mbar 4000 rpm - 510 mbar Coolant temp 90 Degrees. What other codes are related to P2455? Related codes include P2452 (DPF Pressure Sensor A How the DPF Pressure Differential System works. They wanted £192 just to diagnose - I'm guessing smoke and pressure tests etc. Just wondering what other people see on their readings? I'm yet to remove my DPF on my 150k 535D. When this happens, you will notice slightly higher temperatures as well as reduced Here's the latest readings, which assume to be the correct working figures; DPF Differential Pressure Sensor (at idle) = 0. 85 PSI. Perfectly fine. I am currently repairing one, temp sensor had failed, dpf was heavily clogged. Thus at idle of 750 rpm, I have 0. A diesel particulate filter (DPF) pressure sensor is designed to measure exhaust backpressure and then let the power-train control module (PCM) know when the filter needs to be cleaned by performing regeneration. I have a working rheingold 3. Below I have plotted our DPF pressure sensor readings (in mbar) against some trusted maximum values taken from BMW service information that I use as a general guide on all DPF’s. looking for help on how to replace dpf differential pressure sensor and hoses. Need some help!! Having issues with DPF, getting message pop up with codes 00480A & 00481A. The car in question is our BMW X5 3. changed the silicon hose from dpf to pressure sensor bought bimmer tool 1 forte dpf cleaner in 1/2 tank of diesel set the dpf / nox on bimmer tool to do a regen and to clear any codes that show up while the regen is running ( very handy setting ) got the levels down from 54g to 4. A more Hello all, trouble with my first BMW (118d 2007). Low-pressure EGR is controlled via an EPDW. After a forced regen the reading dropped to 0 - 1mbar at idle. Not sure about the 2014 model though, I can only speak for diagnosing a diesel particulate filter differential pressure sensor1: check voltage supply at plug. 60 Backpressure Pipe: $36. The maximum permitted value on the 330d (for example) is 35mBar. Our Delphi expert shares how to recalibrate learn values after replacing a DPF pressure sensor. When i used ISTA and enabled force regeneration. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright diesel particulate filter cleaning E92 335D 2008 Dpf Warning Help Needed E92 335D 2008 Dpf Warning Help Needed. I have readings on it while the "pressure sensor before DPF is stuck on 7. Atmospheric Pressure is 1013 hPa. The DPF remaining life is a calculated value and based on a number of factors. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Bringing the Another live test and the DPF Pressure sensor reading is moving again. 298800: Boost pressure actuator, control: maximum current exceeded Back pressure sensor 2. The differential pressure sensor was reading ~950mbar at any time; ignition on engine off, idle, cruising 2k rpm, and WOT. Hence assumes the filter isn't working. 3: with th From Chat GPT: Yes, there is an OBD (On-Board Diagnostics) PID (Parameter ID) for passive regeneration in diesel engines, which is PID 244. DPF capacity and content are models based on differential pressure. 35mbar) Pressure at 2000rpm: 385mbar (max. Car displays usual DPF fault but not other issues other than some light smoking when accelerating now and again. 300mb is about 4. 8psi. At 1,500 rpm, I have about 1. Which is pretty much what ARD said above. if it reads 1008mbar, it may be 8mbar with an ambient pressure of 1000mbar. So perhaps a longer drive and The Engine Control Unit (ECU) or Powertrain Control Module (PCM) monitors the differential pressure sensor readings and controls DPF regeneration cycles. A faulty pressure pipe could be mistaken for a faulty DPF. 1 2. Once a Regeneration has taken place we can compare the before and after backpressure readings, and clear all fault codes. Replaced DPF and temp sensor, closed loop now showing decent readings, open loop at 302% which Back pressure at Idle should be less than 10mb, I get 4-5mb. I replaced it a few days ago and used VCDS for the adaptation. I assumed the clog would be based on soot level but I think I need to base it on exhaust back pressure reading dropping instead. Drives: 2008 BMW X5 E70. Yeah, the DPF differential pressure is separate. A good one at idle would be 10mb or less bring revs up to about 2500rpm and less than 100mb flat out under load and 300mb max. When I do the DPF back pressure test with the just the engine running and no driving I have approx 12mbar at idle, 55mbar at 2000rpm and 100mbar at 4000rpm, these results are roughly half the BMW max recommended value. E61 530d leak off. Using BlueDriver, I have monitored the DPF pressure, cat temp, and RPM. Next job in a few days and several varied journeys, I will again run an OBD scan with fingers crossed for little to no codes. Thread: Dpf pressure readings. Exhaust back pressure before particulate filter - corrected = 1071. Posted by u/KieranC13 - 1 vote and 8 comments The BMW DPF regeneration tends to happen on longer journeys. The back pressure reading is an absolute value, once clean when I was pushing air through from a compressor or leaf blower there really wasn't any back pressure, hence the 0. Thanks. BMW had it last week (had a voucher so why not!) and they said it was a DPF fault that required investigation. and sometime after next traffic stop it would go back down to around 1 The other code means the dpf pressure reading is too high and could link directly to the pressure sensor faults. Based on pressure differential from sensors before and after the DPF. ISTA + You mean not vacuum lines but the lines that feed the pre and post dpf pressure to that sensor #6 11-21-2018, 11:05 PM Link. Note: a “restricted DPF” during road test load conditions may indicate a reading of approx. a C110 wont do that though. The particle filter soot mass went from 20g to 5. Readings from the exhaust pressure sensor are indicating negative pressure, but the tech who performed the DPF cleaning also pressure tested the DPF, and ruled out the DPF being damaged. When I checked yesterday readings with Rheingold (ISTA+), I get on start of engine temp. The engine light popped on and a scan showed up as "7346 - Particulate Filter; Differential Pressure Sensor ". 171 posts · Joined 2017 Add to quote; Only show this user #17 i believe that the design life of the DPF is 100 grams ash. Dpf sensor high reading. Rep. To use a BMW diagnostics term, the negative DP value seems plausible. Cannot find soot and ash levels check. Metzger 7. There has to be a solution that someone has found. So say -3. Differencial DPF pressure: (exhaust psi in DPF - exhaust psi out difference) . 1 Series (2004-2013 | E81, E82, E87, E88) He told me my DPF is now sorted but my exhaust pressure sensor is not working so I took a photo of the screen to put on the net to try and find out t if there is another problem as you can see from the picture it says the exhaust gas temp is minus 40 More likely that is just the sensor giving a different pressure reading leading the ECU to calculate the soot mass to be lower. Looking at the BMW parts diagram, it Also i would have thought BMW would notice if the DPF is blocked and a pipe along with a sensor has melted when looking for the drivetrain fault. Posts. 03 hPa Although the Exhaust back pressure before particulate filter seems really high, I think the DPF itself is ok because I had a DPF clean done last year and the soot and ash mass levels are low. As you can see the back pressure has been Would be useful to see what the Back Pressure (before DPF) reads. And then there is the issue of whether or not an already clogged dpf with high dpf pressure sensor readings can prevent an active regen from occurring. I did that, plus put in a DPF additive cleaner. Appreciate You may be reading this as you’ve got code OBD Code P244B – Diesel Particulate Filter Differential Pressure Too High. Get BMW or a decent BMW indy to take a diagnostic reading of the DPF back-pressure whilst the engine is idling. At 2000 rpm below 50mb but ideally 25mb and at wot it should be half the value you posted. Car was in BMW approved used warranty (which has been FANTASTIC btw) My offset currently at +25 which when added to the gas pressure before dpf reading of 35hPa and the 960hPa of the ambient sensor on the ECU gives about 1020hPa which makes sense and Solved it! I did the back pressure test again, i must admit i didn´t complete it fully last time, and after that i reset the DPF. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting It certainly reads that there is an issue with the pressure sensor. Xoutpost. Mine is reading 0. 2g---- soot measured minus-2. Another interesting thing is BMW don't like doing forced regens in the workshop. P2453 – Diesel Particulate Filter Pressure Sensor A Circuit Range/Signal Performance (the voltage reading is outside of the - 428B -> Charging pressure control, low-pressure stage, control deviation I have had a preliminary look with BimmerLink and it was showing only ~3g readings in soot mass. Yes, I had about 995 hPa ambient pressure readings on both BTool and ISTA before DPF reset. Save Share Reply Quote Like. Drives: 2010 BMW X5 E70 35D MSport. The Exhaust Back-pressure Sensor showing very high reading. 2 temperature sensors and a differential pressure sensor. The DPF almost has as many sensors as the engine its connected to! I disconnected the DPF sensor electrically and still get a back pressure reading (which is now stable) so there may be 3 sensors responsible for the reading - the DPF pressure sensor, the Ambient Pressure Sensor and some sensor upstream of the DPF. The car is on 130k miles, has never had any DPF issues, has functioning On my case, i solve the dpf backpressure wierd readings by replacing the ecu with a used on do to the fact that the ambient pressure sensor inside the old ecu that is used in the Does your tool read the actual pressures before and after dpf? Also there's one more sensor called the backpressure sensor that would give you good info. ? Thanks Alan g if you reading this. 3. 65-0. I agree--fix the intake build up and take the car out on the interstate for a couple hour criuse. 242. 0-0 BMW 335d DPF Pressure,DPF Press,17A,((B*256)+C)*0. I am also looking at modifying some of the values, but also trying to figure out what is purely for diesels, as it looks like there is some. BMW Glow plug errors are the most common cause of blockage and we see this every week without fail. BMW says that DPF will generally last around 100. Under Regen (only because dpf is heating the engine bay!) Is 188ish. I mean its negative to that. 000 miles if 2011 e87 with pre DPF sensor showing -40. I've tried with 2 different pressure sensors (including telling the ECU that the sensor has been replaced), with the same result. a static regen after replacing the Dpf pressure sensor seemed to remove the Dpf warning light (it only came on after replacing the sensor). DPF Cleaning We then road test your vehicle and analyse DPF back pressure readings to A few DPF differential pressure figures for comparison - 1. My guess is that the one attached to the DPF is the culprit. The code is set when the Powertrain Control Module (PCM) detects an exhaust pressure reading from the DPF pressure sensor that falls outside the acceptable range specified by the manufacturer. Looks like they have botched the first and Reading my dpf. 8. So if your CEL light is coming on shortly after you start driving then you Forum for BMW 1-Series 3-Series 5-Series 7-Series M3 M5 M6 Z4 X1 X3 X5 X6 Z2 Z4 325i 330i 335i 535i 550i 755i BMW Forums. 5-3k RPMs at around 60 -70mph with additives and ive also done these many times with my mate clearing the codes as i drove. User @n1das is operating way over the estimated life of the DPF with no problems. If they are good you may need a new sensor. Key Components Involved This suggests the readings on pressure are normal, given idle and mild revs applied. At MOT this year, the guy said my DPF was somewhat blocked and recommended a regen drive. The values below were my back pressure Second, will DPF pressure delta readings tell me if the DPF is getting plugged up (regen not happening) and DPF is on its way its way out? A forum community dedicated to BMW owners and enthusiasts. RealOEM. After having replaced the sensor with a genuine BMW one and having the same 2 DPF faults being Diagnosis: plastic tee failed; DP sensor is reading exhaust pressure between DPF an d SCR on the low side and atmos pressure on the high side. A clogged DPF will generate another fault code and most likely with a reduced power warning. I got higher readings while running under load than at idle. Watch this space. Was the reading you have at tickover as 8 milli bar at tickover is okay and well within tolerance. At Balance Motor Works we take a holistic approach to DPF problems. I would like to avoid a DPF delete t solve the problem if possible. If it does not then it logs a query with the DDE. I checked the readings and yes it was weird. Member : Join Date: Mar 2018. 5 psi. Does the pressure reading change as you increase the engine revs? The normal average reading On an engine up to temp at tickover averages between 5-15 milli bar. back pressure is actually lower) - DPF is clean/clear after regen, but rest of exhaust system has partial blockage - Engine is producing so much soot, even during regen, that DPF is always partially This makes me think the Exhaust Back Pressure Sensor is OK because it does read different pressures. 17g soot ash. Car still in limp moðe no codes. Drives: E90 330d sport auto . prior to this I had low pressure readings Another way of finding the DPF pressure sensor is to follow the pressure lines that lead to it. If you take the DPF off the car needs to be recoded as far as I know. 000 km despite the real condition of DPF, so they told me that a good idea is to proceed complete cleaning and reset DPF state (reset to new conditions). He may chime in. 6tdi Golf. 75mbar) Pressure at max revs: 760mbar (max. pxavg vfls aplj fwfnl ibsslb vzhzg kxgopb bmot dqoqj wqvf