Quote:
Originally Posted by Oldmactech
My 3.0 won’t complete the OBDii diagnostic cycle to pass emissions in GA. It completes 7 of 8 cycles but after nearly 400 miles, numerous starts, all types of driving I still get the catalyst monitor incomplete but no codes. Last month a got a bank one before catalyst check engine error but I cleared it and reset the adaptations.
As a senior I am exempt from exemptions but if I tried to sell it would need to pass.
This car had a shade tree head gasket done 1200 miles ago, is it possible I left something disconnected or have one of the O2’s reversed in their places causing it not to complete the diagnostic cycle?
Thanks.
Sent from my iPad using Tapatalk
|
If you had reversed the lambda connectors you would have all kinds of codes so I doubt that is it. Since you had the head gasket failure and probably pushed a lot of water down the exhaust it could have compromised the sensor(s). I would have a good look at your LTFT and STFT values and check you lambda voltage values. They are cheap enough to just replace if you have over 125,000 miles I recommend it.