I have a 07 Tahoe. Recently the CIL came on with code P0455. The gas cap looks fine. I changed the Evap Solenoid, reset the CIL and it comes back on when the gas tank gets half empty. I tried another gas cap. No luck. Any suggestions next?
Chevrolet Q&AAsk Your Question
2007 Chevrolet Tahoe Question: 2007 Tahoe code P0455
Answer #1pushrod October 04, 2013, 04:19Master
Have the evap system smoke tested to find the leak. While tank is half full!!!! or less.
Replysmorrow0816, October 04, 2013, 07:01Rookie
Any good way for me to do the smoke test or is this a dealer thing. What do you think about the fuel tank pressure sensor?
Replypushrod, October 04, 2013, 07:38Master
It needs to go to A repair shop, not necessarily the dealer for testing and repair!!! Smoke machine and a professional scanner needed for ACCURATE test!
Replysmorrow0816, October 04, 2013, 22:22Rookie
One last thing....I also notice that when I pump gas, it stops numerous times making it hard to fill the tank. Any indicator of how that is related?
Answer #2Greg's Orange Auto (13020 Answers) , Orange, CA - (714) 361-9386globalhelper October 04, 2013, 05:50Master
agree with #1