Service engine light keeps coming on. OBDII P0446

Hi

This engine code is related to a malfunction in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

Probable causes are;

1- Purge or vent solenoids defective.
2- Defective wiring or bad connections in the vent valve/solenoid circuit.
3- Fuel saturated vapor canister.
4- Failed EVAP vent solenoid.

These engine codes are useful indicators to where the fault lies but usually require further troubleshooting to fully determine the underlying cause.

However I have listed the probable causes so to give you a starting point for your investigations.

Hope this helps. Please remember to rate my answer. Thanks.

It's a fail EVAP vent test.

DO NOT TOP OFF the tank when you fill up the gas tank.

Make sure the gas cap is tight.

You will need to locate the vent solenoid/valve.

Attach hose on both end,apply 12V to the vent solenoid/valve and blow though it.

The passage has to be clear.

Clear it out and re-attach original hoses.

Clear the code and the P0446 should go away.


THE KEY IS DO NOT TOP OFF GAS TANK.