View Full Version : P0171 CEL code and Gas cap issue?

11-27-2014, 03:36 PM
I was wondering if its possible for an old gas cap to throw a P0171 cel code.. For about 3 weeks now i had the code come up after a little while of driving then i would erase and it would come back on after few days . I was thinking it would be my MAF sensor or a leak in the vacuum line, so today i filled up gas to almost full and started the car and the CEL went away.. its possible to conclude there was an issue with the pressure inside?


11-27-2014, 05:38 PM
Don't think they are related. Likely a MAF sensor

11-29-2014, 05:40 PM
Thanks, I think you are right. Today it came back on after 2 days. have a new maf I think I will throw it on