QuickSilver_SS

This morning on the way to work after I got off the high way and came to a stop. A message " check gas cap " come up on the dash. Is this message caused by the purge vavle on the intake manifold ? Or the one under neath the car at the gas tank ? Or neither ? I know for a fact my gas cap was on tight. The engine light is not on at all. And the car seems to start up fine and has no problems ideling. Any thoughts as to why this message would come on ?

tomj77

iTrader: (2)

Just give ur cap a few more turns.

ROB517

lol I’ve been battling this problem for 2 months now. If it keeps happening your engine light will come on

Chevy_tuner

iTrader: (1)

when this happened to me my ss was running fine. Then after a week or two the car started to have a rough idle.

I had the purge valve solenoid replaced on the intake manifold and problem fixed.

prevsrt4owner

Could be the purge valve taking a dump. I got the same message once, and I just tightened the cap . . . no worries since.

QuickSilver_SS

My local dealer told me $55+ taxeds for the purge valve on the intake manifold. And $65+ tax for the valve under the car by the gas tank. The guy at the gm parts counter told me to replace both valves. Seems pricey to me. I always thought they were all of $30 or $40 dollars.

Sox-Fan

iTrader: (7)

Buy it from rock auto for 25 bucks and spend the 3 minutes it takes to change. be ahead of the game

QuickSilver_SS

I checked rock auto. Great site and prices. But they listed 3 or 4 different solinoids for our car. Which one do I order. A few of them even look the same but have different part numbers. Anyone know which part number is the corrrect one for an 09 lnf ?

prevsrt4owner

Canister Purge Valve Solenoid | 2009 Chevrolet Cobalt 4 Cylinders X 2.0L SFI Turbo DOHC | AutoZone.com

PV423. Just go to your local parts store. If they don't have it in stock, they'll have it there the next day (more than likely). It worked for me.

Psykostevo

Another problem that I have seen cause this on LSJ cars is a leaky seal at the fuel pump. Usually those cars will randomly smell like a gas station too.

umrdyldo

iTrader: (1)

You can do both, but start with evap purge on the manifold and wait and see if it comes up.

I have heard of almost no one having the tank valve go bad.

On my third evap purge.

kzak104

iTrader: (1)

came up on my car once, cleared the code, hasent come back yet.

Bluekid99

Happened to me the other day just came home took the cap off after I turned the car off and put it on back and restarted the car...message gone and no problems and been about 2 weeks

EmperorJJ1

iTrader: (5)

PSYCOSTEVO???? what up bro

C0balts5

Check the fuel lines towards the back of the car where the start to bend to go up and loop around to the fuel tank. There is silver heat tape that has cloth underneath that traps water and rots the lines out underneath. Went through all this with my 08 ss. I smoke tested it and it looked like the fuel tank but I did more digging and when I cut open the heat wrap it looked like a marshmallow underneath. Thankfully rock auto sells a fuel line kit that you simply assemble in pieces from front to back. Must be common cause my buddy's 06 ls did the same exact thing. Except his started spraying fuel and was obvious. The rock auto kit is way easier than trying to buy the factory lines whole and trying to jam them in