Driving around today in MN. Conditions 21 degrees and snowy when the check engine comes on.

I have an interceptor so I was able to grab the DTCs.

P0171 Fuel Trim System Lean ECM, PCM
P0446 Evaporative Emission (EVAP) Vent System Performance ECM, PCM
P0496 Evaporative Emission (EVAP) System Flow During Non-Purge ECM, PCM


Anyone have any advice or know what could be the problem and how to fix it?

I'm completely stock.

Thanks.

 

Check your gas cap and see if it is tight. How many miles do you have on your car?

 

10,300 miles.

 

Take it to the dealer. its stock so they cant hassle you, and no sense in wasting your time or money if the dealer can figure it out at their cost.

 

P0446 is usually caused by crap in the vent tube from the charcoal canister
P0496 is usually caused by a bad purge valve(stuck open)
Both of these together usually suggests a bad fuel tank pressure sensor.

P0171 is lean code, code be anything causing engine to get to much air or not enough fuel. Make sure your dipstick is still pushed in all the way.