Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, P0171 code in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; So after fighting this code off finally a month ago. Yesterday it reappeared then went away later in the evening. ...
- 09-23-12 11:00 AM #1
So after fighting this code off finally a month ago. Yesterday it reappeared then went away later in the evening. Anyone have any guesses on this issue. I have new Maf sensor air filter new 02 sensors and no vacuum leak.
- 09-23-12 01:05 PM #2
Re: P0171 code
worth checking for a small exhaust gas leak on your exhaust on bank 1 side between the sensors, also worth having injectors cleaned.
when was last time fuel filter was done?
- 09-23-12 02:00 PM #3
Fuel filter not sure not since I've owned it been a year now and I had the injectors cleaned a few months ago along with throttle body.
- 09-23-12 05:08 PM #4
Re: P0171 code
Id go with a new filter and see how it goes
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