P0446 Pontiac - 2002 bonneville

Question

I am looking to troubleshoot this code and am interested in the path to take.

Answer 1

HI there

There are a few causes for this code. I would start by testing the vent control solenoid on the canister. If you remove it and then run power and ground to it, you should hear a clicking type sound. If it's good, then check for a plugged purge line from the canister to the engine.

P0446 PONTIAC - Evaporative Emission Vent System Performance

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