Notifications
Clear all
0
02/03/2021 3:53 pm
Topic starter
Scotty, I have a 2011 chevy silverado with the dreaded p0442 code. The command evap percentage shows at around 20% while the car is running and evap_vp at -0.2 (inH20). I am thinking the purge valve is the culprit. Where should I start?
Can I use a cigar with a vacuum hose and blow into evap line to find leak?
3 Answers
0
02/03/2021 3:55 pm
Start here:
https://www.obd-codes.com/p0442
Also, see here:
https://m.youtube.com/watch?v=LNaJTP-6u1s
0
02/03/2021 3:57 pm
Start with the fuel cap. If it is loose or the seal is bad, it can cause a small EVAP leak. Make sure the seal is good and the cap is tightened until the "click" point.
0
06/03/2021 7:17 am
