Manager Forum

I have this Avalanche that intermittently has this code. Have run the service bay test before and has passed. Today it did fail. I hook up the smoke machine and pressurize the system and no leaks found. I am thinking possible bad purge solenoid or tank pressure sensor?

I've had plenty of intermittent vent solenoids on these. Sometimes I cycle them many times before I can get them to fail. Intermittents are tough but it sounds like you're on the right track.

I just keep trying tell I find or dont find anyhting and be upfront with the customer if it doesnt show bad now doesnt mean it isnt but you hate to repalce soemthign you cannot condem either

We get a few of these intemrittens as well. It usually shakes out to be an vent valve intermittently acting up. We to just keep trying. We will use a heat gun to heat it and tap on it to.

Ok this one is fixed. It was the purge solenoid. Customer has been driving it now for 2 weeks and no light.