Codes P0449 and P0455

Tiny
WILLIAM8588
  • MEMBER
  • 2019 CHEVROLET SILVERADO
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 35,500 MILES
I changed out the Vapor Control Valve Canister and I still have the error code.

Any advice?
Tuesday, May 31st, 2022 AT 6:08 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The code
P0449 Evaporative Emission (EVAP) Vent Solenoid Valve Control Circuit
P0455 Evaporative Emission (EVAP) System Large Leak Detected

These can get triggered due to faulty components, any leak within the EVAP system or wiring issues.

https://www.2carpros.com/articles/evap-system-code-repair

I have attached the troubleshooting steps for these codes below. Follow those steps as that can help you determine the issue.

Let me know of any questions.
Thank you.
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Tuesday, May 31st, 2022 AT 9:28 AM

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