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Chevy Equinox 2005 OBD2 P0455 Code: How to Fix After Replacing EVAP Components

Model: Chevy Equinox Fault Code: P0455 Posted: 2015-06-03 03:25

I own a 2005 Chevrolet Equinox and am currently experiencing a persistent P0455 diagnostic trouble code. I've already replaced the purge solenoid, vent valve, gas cap, and charcoal canister—four months ago—but the P0455 code has returned. Despite these replacements, the issue persists. What are the most effective troubleshooting steps for this recurring EVAP system fault?

Related fault codes

P0455

Comments (2)

Anonymous 2015-06-03 08:00

Visit http://www.obd-codes.com/p0455 for detailed information on P0455. A professional shop procedure involves using a smoke machine to detect leaks in the EVAP system. As an alternative, perform a thorough inspection of all hoses and components within the evaporative emission control system. Remember: simply replacing parts does not guarantee they are functioning properly—physical integrity and sealing must be verified.

Anonymous 2015-08-09 14:49

Inspect the fuel tank lines where they connect to the tank, as plastic cracks at these joints are a common cause of leaks. You may need to remove the tank to access the connection point. In my case, I sealed the joint with epoxy and have not experienced any further P045 or EVAP-related issues since then.