Quote:
Originally Posted by steve99
Unfortunatly the rear 02 is only used for cat efficiency checks and cruise fueling minor adjustments.
The front 02 is the primary sensor used for engine fueling measurements.
If p0171 came back you still have a problem if no leaks it likely ptimary front o2 is damaged
All engine ecu codes are cleared on reflash or engine ecu reset, P0171 is an engine ecu code. Other control units may retain codes like body computer vsc computer ect when engine ecu is reset.
If the P0171 came back you still have a problem, did the front o2 sensor unscrew easily and did it look ok ? was it scrwed all the way in ?
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Oh no. Please tell me that's not the problem. The p0171 is showing on the OFT ECU fault codes. Then I just erase it there. I'm not actually getting the engine light in the car. Just checking if there's like a hidden ECU fault codes. The front o2 sensor is actually snug in there. It's not moving and it's screwed in all the way. Although, the washer for the primary o2 sensor is a little loose, but the actual sensor itself is really in there, wont get unscrewed unless I unscrew it.