P0446 Code The Ultimate Troubleshooting Guide for Mechanics

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). P0446 is triggered when the ECM has detected improper resistance in the circuitry to activate the vent control valve. Check the Ground and power ... And P0446 means the vent valve/circuit for the EVAP system is malfunctioning. Tester. It_s-Me October 31, 2022, 11:48am 4. The P0446 code on a Chevy Silverado signals a problem with the EVAP system vent control circuit, usually due to a faulty vent control valve, ... The P0446 error code signifies a problem with the evaporative emission control (EVAP) system's vent control circuit. This Diagnostic Trouble Code (DTC) tests the Evaporative Emission (EVAP) system for a restricted or blocked EVAP vent path that would cause excess amounts of ... A P0446 is not a code that points to a specific problem, rather it indicates a voltage irregularity in the EVAP vent control circuit. The code only means there is something wrong somewhere in the entire vent solenoid circuit, not necessarily with the vent solenoid itself. Code pulled is P0446: Evaporative Emission Control System Vent Control Circuit. Went to Mazda for a diagnostic out-of-warranty ($120). They found the issue was ... I have an 03 tundra v8 that sets a P0442 & P0446 code every spring. There is a toyota service bulletin for P0446 that says to test and replace the VSV valve.