What causes code P0446?
Code P0446 is set when the car’s computer believes (either correctly or incorrectly) that there’s a problem with the vent valve. Some systems use vacuum pressure readings to judge vent valve performance. As such, in some cases, parts that might surprise you can trigger the code.
What is GM code po446?
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).
Is code P0446 serious?
How Serious is Code P0446? – Low. The driver will likely not notice any symptoms associated with P0446 other than the check engine light being on. However, as with all check engine light diagnostic trouble codes, you should repair it as soon as possible to return the vehicle to normal operation.
What code is this P0446?
Evaporative Emission Control System Vent Control Circuit
Trouble code P0446 typically turns up in On-Board Diagnostic testing on account of an illuminated Check Engine Malfunction Indicator Lamp. This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning.
What causes p0446 code on Mazda Tribute?
– In Mazda Tribute and Mazda 6, the stuck open purge valve (solenoid) could cause the code P0446 or other EVAP codes. The purge solenoid is not very expensive to replace. What needs to be checked:
Why does my Toyota Corolla have code p0446?
– The TSB for 1999 Toyota Corolla suggests replacing the ECM with an updated part as a repair for the diagnostic trouble code P0446. In some GM cars, a bad fuel tank pressure sensor also could cause the code P0446. – In Mazda Tribute and Mazda 6, the stuck open purge valve (solenoid) could cause the code P0446 or other EVAP codes.
What causes a Nissan Maxima to have a p0446 code?
The bulletin recommends checking the vent valve assembly and if needed, replacing with an updated part. – A Nissan technical service bulletin (TSB) for late 90’s Maxima, Sentra and Pathfinder mentions a faulty EVAP system pressure sensor that can cause the trouble code P0446 and some other EVAP system codes.