Quote:
Originally Posted by austin2334
Any insight would be appreciated.
Car is ‘12 dct catless alpine tune. Tune and exhaust on about 2-3 years.
In 2023 a single code popped up P2297, increased emissions. I swapped the front 02 sensors and the code jumped to the other bank. Easy, replaced 02 and I was good.
Last week, I got the same code again on the newer sensor. I swapped the sensors, and the code jumped again. Is something fouling Bank 1 sensor? I’ve looked via ista and cleared sensor adaptations. I’ve only ever had that single P2297 (2728) code.
Anything have thoughts?
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austin2334 in addition to
DrFerry comments - -encourage you to consider findings and expensive lessons directly related to described 'symptoms'.
There can be multiple 'causes' for emissions issues. Sounds like you have ISTA, if so go with native BMW codes for best diagnosis as opposed to generic PXXXX codes. Clearing adaptations for emissions alone, not the answer as there's several other useful DME and system measures reset/lost.
One telling measure is
idle trim. Observe readings 'live', particularly behavior during cold start idle then idle trim transition to normal op temps. Typically provides an indicator if idling, running lean [posts on this topic as well].
> Have a look at link - - tune related causal & correction factors