Service engine light soon, code P0455

2004 CHEVROLET TRAILBLAZER
144,000 MILES • 4.2L • V6 • 4WD • AUTOMATIC
Avatar
BLESS2SUCCESS
  • MEMBER
  • 45 POSTS
My service engine light won't stay off after I had change the fuel cap, purge valve and charcoal canister valve. What other problems can be done to finally repair this issue?
Jan 12, 2019 at 1:34 AM
Advertisement
Avatar
KENW1
  • ✓Experienced Mechanic
  • 213 POSTS
Thanks for visiting 2CarPros.

The next steps would be smoke testing the evap system to see if a line is cracked or leaking at a seal.

If no leak is present it may be the fuel tank pressure sensor.

https://www.amazon.com/ACDelco-16238399-Original-Equipment-Pressure/dp/B000NW4OPC

Jan 12, 2019 at 3:23 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.