35d Diesel Codes Help!

[dawit]

Calling on all 35d specialists to help out please..

So I have the following codes that came up :

290900 Air mass system: Measured air mass too high
290B00 Air mass system: measured air mass too low
2BB100 Diesel particulate filter: efficiency too low
2C2200 Coolant temperature sensor upstream of low temperature EGR cooler, coolant temperature, signals: implausible with each other.

My last 1000 miles, I did not see regen occur.
I took it to BMW dealer and they say I need to change my DPF.

Is this a faulty thermostat or DPF issue? Any other insight on probable cause? your insight would be greatly appreciated..

[mrrsharma@yahoo.com]

Sounds like you have a vacuum leak, check the rubber hose by the oil cap. It might be torn.

That will address the a few codes.

Also check/the EGR flap actuators, and the EGR vacuum lines… those also could be leaking or cracked.

As for the dpf, after doing all of those, perform a force regen and drive an hour on the free way at 70 mph.

That should clear up the dpf… if the dpf is real bad, then you might need a dpf service done.

[Clifton]

mrrsharma@yahoo.com is right, most likely a vacuum leak. Have you had the EGR recall work performed yet? It's also possible that your intake plenum is compromised due to the EGR/coolant issue.

[dawit]

So just to clarify, both the dealer and an inspection mechanic both showed only 2BB100 code show up. The other three codes only showed up at one independant shop I went to (which was what I posted above). Dealer recommend changing DPF filter and also indicated there was some oil leak and recommended gasket head cover replacement, which I am not sure if needed at this point.

I did buy the DPF part and looking to replace the DPF (all in all costing $2500 including labor at a local mechanic), but just have an lingering fear of the other three codes which appeared at another shop. I do hear some hissing sound that comes right at 2000rpm until about 3000 rpm, not sure if is turbo noise, but I thought turbos still have lingering spool sound when I let go of gas and since I don't hear that, it does give me a bit of unease. I will have the mechanic check out all the hoses as you guys have recommended.

[Wardman]

Originally Posted by dawit

So just to clarify, both the dealer and an inspection mechanic both showed only 2BB100 code show up. The other three codes only showed up at one independant shop I went to (which was what I posted above). Dealer recommend changing DPF filter and also indicated there was some oil leak and recommended gasket head cover replacement, which I am not sure if needed at this point.

I did buy the DPF part and looking to replace the DPF (all in all costing $2500 including labor at a local mechanic), but just have an lingering fear of the other three codes which appeared at another shop. I do hear some hissing sound that comes right at 2000rpm until about 3000 rpm, not sure if is turbo noise, but I thought turbos still have lingering spool sound when I let go of gas and since I don't hear that, it does give me a bit of unease. I will have the mechanic check out all the hoses as you guys have recommended.

Similar issues... I am having the DPF cleaned first. They do this to trucks all the time, rather than pay to replace. Thee is a SB for cleaning it as well from BMW.

https://static.nhtsa.gov/odi/tsbs/20...46534-9999.pdf

[dawit]

UPDATE : The car is still be in the mechanic shop for 6 weeks now. Mechanic doesn't believe anything wrong with sensors.. (he hasn't replaced any) and claims he has checked all pipes for leakage but hasn't found any. (Although I am not certain he was thorough) He recommended replacing DPF as the solution which we did (cost me $3000) and I believe he cleared the codes and I was instructed to drive it to see if any codes will reappear. And it did. In fact, same set of codes plus some more (below) came back and CEL is on solid. Took it back to the mechanic, he doesn't have a clue but to blame it on the newly replaced DPF which he claims is not OEM, thus could be the culprit, which I don't believe is the issue since the codes are the same prior to replacing it. The part is brand new from WL-parts.com, a reputable company and the specs are exactly correct.

Current Codes :
290B00 - Air system, air to EGR mass flow plausibility; measured air mass too low compared to calculated air mass
290900: Air system, air to EGR mass flow plausibility: measured air mass too high compared to calculated air mass
2C2200 : Coolant temperature sensor in front of EGR cooler, plausibility: coolant temperature in front of EGR cooler to coolant temperature not plausible.
28DE00: Exhaust pressure sensor in front of the turbine, plausibility: exhaust gas pressure in front of the turbine is dynamically implausible
282900: NOx storage catalyst, plausibility: NOx regeneration efficiency too low
2BB100: Particle filter system, plausibility with particle sensors. Particle filter efficiency too low.
D35744: Message error (data drive train2, ID: DT_PT_2) - timeout
D358F8: Signal error (status distribution longitudinal torque front axle rear axle, ID: ST_REPAT_XTRQ_FTAX_BAX) - Invalid
805268: Transfer pump, control: implausible

Mechanic doesn't seem to have a clue and tries to ignore the symptom that I am alerting him about - that there is a shrieking noise upon light acceleration from 1800RPM to 2200RPM. Some of you have indicated below advice, which I've forwarded to the mechanic.

At this point I can't even get the car to be registered due to the fact that it can't pass the smog test. The mechanic doesn't seem to have a clue at this point and Im just trying to help him out otherwise, will need to find a more competant mechanic. Highly appreciate for those who are knowledgeable in with this situation to offer any insight.

[crystalworks]

Originally Posted by dawit

UPDATE : The car is still be in the mechanic shop for 6 weeks now. Mechanic doesn't believe anything wrong with sensors.. (he hasn't replaced any) and claims he has checked all pipes for leakage but hasn't found any. (Although I am not certain he was thorough) He recommended replacing DPF as the solution which we did (cost me $3000) and I believe he cleared the codes and I was instructed to drive it to see if any codes will reappear. And it did. In fact, same set of codes plus some more (below) came back and CEL is on solid. Took it back to the mechanic, he doesn't have a clue but to blame it on the newly replaced DPF which he claims is not OEM, thus could be the culprit, which I don't believe is the issue since the codes are the same prior to replacing it. The part is brand new from WL-parts.com, a reputable company and the specs are exactly correct.

Current Codes :
290B00 - Air system, air to EGR mass flow plausibility; measured air mass too low compared to calculated air mass
290900: Air system, air to EGR mass flow plausibility: measured air mass too high compared to calculated air mass
2C2200 : Coolant temperature sensor in front of EGR cooler, plausibility: coolant temperature in front of EGR cooler to coolant temperature not plausible.
28DE00: Exhaust pressure sensor in front of the turbine, plausibility: exhaust gas pressure in front of the turbine is dynamically implausible
282900: NOx storage catalyst, plausibility: NOx regeneration efficiency too low
2BB100: Particle filter system, plausibility with particle sensors. Particle filter efficiency too low.
D35744: Message error (data drive train2, ID: DT_PT_2) - timeout
D358F8: Signal error (status distribution longitudinal torque front axle rear axle, ID: ST_REPAT_XTRQ_FTAX_BAX) - Invalid
805268: Transfer pump, control: implausible

Mechanic doesn't seem to have a clue and tries to ignore the symptom that I am alerting him about - that there is a shrieking noise upon light acceleration from 1800RPM to 2200RPM. Some of you have indicated below advice, which I've forwarded to the mechanic.

At this point I can't even get the car to be registered due to the fact that it can't pass the smog test. The mechanic doesn't seem to have a clue at this point and Im just trying to help him out otherwise, will need to find a more competant mechanic. Highly appreciate for those who are knowledgeable in with this situation to offer any insight.

Sorry to hear. The diesels can be a b*tch. And I only really have guidance on a few codes. One being probably one of the least important ones on your list. That being the "805268: Transfer pump, control: implausible." Requires replacement of the DEF transfer pump. Dealership wanted $2800. Part is ~$450. I replaced it myself in ~3 hours. Been fine since. But that won't affect any of your other codes... we drove with that code for ~12mo. It doesn't set the CEL and only means you have to refill at the active tank fill as the passive stays full because the pump isn't transferring DE fluid.

The coolant temp sensor code you have I am dealing with now. I need to replace the crossover valve according to BMW. They wanted $1400 to do that... I am doing it myself as the part is $275.

Your other codes are much more problematic and having spent money on a new DPF would certainly be rather frustrating. I've found that independent shops have almost no clue how to handle the diesels and their troubleshooting. Good luck, wish I could be more help. Could be so many things, or combined things. A turbo could have sh*t the bed.