Per TSB, some reasons for P0175.
P0175 - System Too Rich (Bank 2) The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The code sets when the adaptive fuel tables reach a lean calibrated limit.
Fuel System:
�· Excessive fuel pressure
�· Leaking/contaminated fuel injectors
�· Vapor recovery system concern
Base Engine:
�· Oil overfill
�· Cam timing concern
�· Low cylinder compression
�· Excessive engine wear
Powertrain Control System:
�· PCM concern
Induction System:
�· MAF contamination
