THE CODE FROM HELL (2c32 or P2098)

[Absolutegtr]

I have this ever returning code on my 2009 BMW X5 3.0i

2C32 (p2098) Lambda Control 2 Lean Condition

It is only throwing one code and it does it almost immediately like clockwork, about 2 minutes into the SECOND drive cycle.

The car is mechanically 100%. Absolutely no running, idling, or driving issues. Has 117K miles on it. In the process of chasing down this code, I have replaced all 4 oxygen sensors, the whole valve cover and gasket and MAF sensor. Every single part replaced is OEM from the dealer! No vacuum leaks shown during the smoke test.

Has anyone seen this code? Literally the only thing left is a possible fuel system delivery issue, (pump, filter),but I dont think so as there are no running issues and it would affect both banks.... Possible injector issue on one the bank two 4-6 cylinders? .... Or the bank 2 catalytic converter...but I am not throwing any cat inefficiency codes.

Help?

[ard]

Have you done a vanos function test? Something that shows your variable valve timing is working right?

[Absolutegtr]

Originally Posted by ard

Harv you done a vanos function test? Something that shows your variable valve timing is working right?

I have not, but what is your reasoning when I have a lean condition/O2 sensor code. Thanks

[ard]

Originally Posted by Absolutegtr

I have not, but what is your reasoning when I have a lean condition/O2 sensor code. Thanks

Because a engine that is running with valve timing at "B" when the engine thinks it is at "A" can result in AFR errors. Especially if it is happening only at certain RPM ranges or types of driving.



So a motor may run fine at idle, and may run fine at WOT...but at transition in may be lagging, resulting in AFR errors. SO that these begin to show up over time, as a lean or rich conditions.


Is your motor running lean Or is it running rich, the DME has reduced the AFR as much as it can and is now saying 'its too lean'??? FIgure that out first.


Running a VANOS test on a computer is pretty simple. Obviously you need the tool....

[Absolutegtr]

Yesterday, I visited my buddy and euro mechanic to use his scanner to reset the engine and O2 adaptations. Since I just purchased this car, who knows how long the car was running around with a ripped PCV diaphram (earlier in my diagnose I had to replace teh whole valve cover) ....not holding my breath, but the car has yet to throw the CEL and there are no pending codes after two 26 miles drive cycles. (Before it would trip the light, like clockwork, 2 miles into the second drive cycle and I would see a pending code about 2 miles into the first drive cycle - also my additive and multiplicative oxygen sensor values where all over the map)

Will update if it returns.


* ARD, I actually forgot to run the VANOS test sequence while I had his scanner....I will have to do that if and when the CEL comes back on)

[josiahg52]

Resetting the adaptation is not a fix but should be performed when certain sensors or components are replaced m

The CEL hasn't come in because the ECU is still learning sensor input variances between the ideal sensor and your used sensors. Once it determines that one or more sensors fall outside the normal adaptation limits or other mechanical issue exists that prevents the adaptation values from correcting for, it will attempt to adjust trims to normalize operation. That will fail and you will see the CEL.

[Absolutegtr]

Originally Posted by josiahg52

Resetting the adaptation is not a fix but should be performed when certain sensors or components are replaced m

The CEL hasn't come in because the ECU is still learning sensor input variances between the ideal sensor and your used sensors. Once it determines that one or more sensors fall outside the normal adaptation limits or other mechanical issue exists that prevents the adaptation values from correcting for, it will attempt to adjust trims to normalize operation. That will fail and you will see the CEL.

Ok. That does makes sense. Although I did replace the bank 2 pre and post cat oxygen sensors with brand new OEM parts and then fixed the PCV leak and never reset. I will drive it all weekend and report back.

[Absolutegtr]

I’m checking my scanner now. Catalyst Monitoring set to OK/COMPLETE as well as other systems OK AND COMPLETE. Only thing not set yet is the Evaporative System Monitoring

[josiahg52]

A leak in the vapor recovery system can cause problems. Keep monitoring it and see what happens.