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Service engine light soon, code P0455

Tiny
BLESS2SUCCESS
  • MEMBER
  • 2004 CHEVROLET TRAILBLAZER
  • 4.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
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?
Saturday, January 12th, 2019 AT 9:34 AM

1 Reply

Tiny
KENW1
  • 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

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Saturday, January 12th, 2019 AT 11:23 AM

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