Commonly known as "The Gas Cap Code"
Many times it means the gas cap is not sealed down tight and there is excess flow from the purge system.
BUT it could also be that the system has a crack, break or other damage
The car code p0446 is a faulty vent valve. To fix this problem, the vent valve will need to be replaced.
Trouble code P0446 means: EVAP Vent System Performance
need help
it has to do with evap system, and usually requires the replacement of the charcoal canister or valve and sometimes a possible fix is tightening your gas cap.
Check vacuum lines and canister first
Probably the vent control solenoid by the fuel tank.
Check for vacuum leaks and good electrical connection at the EVAP vent solenoid
My check engine light keeps coming on. The code comes up evap p0446. Where would I start with this. I know it could be the gas cap? Then where?
and how to fix it?
Trouble code P0446 on a 1995 Toyota pickup typically indicates a problem with the evaporative emission control system (EVAP), specifically the vent control circuit. To fix this issue, first, inspect the EVAP system for any damaged hoses or connections. Next, check the function of the vent valve and replace it if necessary. Finally, clear the trouble code and monitor for reoccurrence to ensure the issue is resolved.
diagnostic code 42 is the code ford gives for a new vehicle required. too many discrepencies to consider a worthy vehicle
Try replacing the evaporator vent valve. It closes in order to seal the vent so the system can pressurize and ensure there are no leaks.