Can't pass safety inspection - P0447

SonicVQ · 08-22-2019, 12:01 PM

Quote:

Originally Posted by Ghostvette

That is correct, however, the vent control valve 'circuit' includes the gas cap. IIRC, the first step in the FSM for that code is to check the gas cap. Part of the problem is that the OP didn't give us the mileage on the car, plus Nissan sent out recall letters about that canister and that it could be damaged due to over-filling of the gas tank. The more you know.....

With all due respect:
The fault is an electrical issue (An improper VOLTAGE signal is sent to ECM through EVAP canister vent control valve.), so the gas cap has nothing to do with this fault.

The ECU monitors the voltage and current of its inputs and outputs to verify they are functioning properly.

On the 350z/370z (and G35/37) the vent value is a common failure. This is due to the valve being open all the time, except when the OBD evaporations monitor runs.

This allows dirt and water to find its way in and prevent the solenoid valve from make a 100% seal.

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