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Old 03-05-2022, 07:45 PM #1
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EVAP system test bypass

I have been battling EVAP codes for the last 90 days, and I'm tired of troubleshooting and don't want to throw more parts at it.

Anyone find a way to bypass or trick the system into passing the 12-hour/cooldown pressure test?

Most recently I have replaced the charcoal canister, gas cap, and vaccum tested (passed) lines, and checked solenoid operations. I thought the canister fixed the issue, but instead of the lights coming back after three days later (night after a tank refuel). Codes have been P0441/455.

I don't need to pass emissions, and just want the CEL and associated lights to remain off.
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