How do I fix code P0446?
If your gas cap was not loose and you do not see any indications of failure, try replacing the gas cap anyway and clearing the codes. Gas caps are relatively inexpensive and are often the fix for code P0446.
What causes P0446 code?
Code P0446 indicates that there is an improper voltage drop in the EVAP Vent Valve circuit, which can be caused by either too little or too much electrical resistance. This improper electrical condition will cause the vent valve to malfunction.
What does code 446 mean?
Code P0446, otherwise known as Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction, indicates that your car’s computer has detected (or believes it has detected) a problem with the function of the EVAP system vent valve.
How do you clear code P0449 Silverado?
When you get a P0449 error code on your Chevy, the problem is most frequently caused by the vent valve failing stuck open. When this happens, you need to replace the whole canister which has the vent valve attached to it.
What does the a trouble code p0446 mean on an EVAP?
A trouble code P0446: Evaporative Control System Vent Valve Performance means that the EVAP vent solenoid is not allowing ambient air into the EVAP charcoal canister. The EVAP vent solenoid’s job is to allow ambient air into the charcoal canister so that fuel vapors can be purged from the activated carbon in the EVAP canister.
What causes the p0446 code on a Chevy Silverado?
Dirt and dust intrusion into the EVAP canister vent hose assembly, resulting in restricted air flow, may cause this condition. The cost to diagnose the P0446 CHEVROLET code is 1.0 hour of labor.
How much does it cost to diagnose a p0446 Chevron code?
The cost to diagnose the P0446 CHEVROLET code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type.
When does the powertrain control module set the p0446 code?
The Powertrain Control Module (PCM) sets the P0446 code if the vacuum decay rate is greater than a predetermined value. | What are P0446 CHEVROLET code possible symptoms?