RYRO14

iTrader: (1)

Threw a CEL and called onstar and they said it was my evap system malfunction, what does that mean?

Gettinausernamesucks

If you don't get the fuel cap tight it will drop an evap code. The system runs a pressure test on your fuel tank and purge lines everyting you drive the car. If the pressure test on the fuel tank fails it will set an evap code. A loose fuel cap will also cause it and is the most common reason.

Terminator2

Could be loose fitting on the purge canister. Or a leaking or stuck purge solenoid (on intake manifold). Mine used togive that CEL. It ended up being that the purge cannister had fitting that was loose. I fixed it myself.

RYRO14

iTrader: (1)

Yea I just took it to the dealer they said it was something about a canister or something and purge solenoid? Whatever it is warranty

KimiKiri

I had this same problem. Just make sure your gas cap is on tight and it will go away after a few weeks. You can also go to the dealer to have them reset it if you like. I did not do this because Im tuned...

rckrz6

i was on it hard and shifted into 2nd on a wet ground with traction control on.. It threw me a service cel code real quick then went away

RYRO14

iTrader: (1)

I guarantee it was a misfire. Most LNFs have had a misfire in their day

Terminator2

I called it.

That is what I thought it was.