What does the code p0446 mean on a vent valve?

A code P0446 could mean one or more of the following has happened: Open, short or excessive resistance on Vent valve control circuit With a P0446 OBD-II trouble code, here are some things to try: Repair open, short, or resistance problem in control circuit Repair open, or short, or resistance problem in power circuit

What does ECM code p0446 stand for?

Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test. There will be no obvious symptoms to driver, other than Malfunction Indicator Lamp (MIL) illumination. A code P0446 could mean one or more of the following has happened: Open, short or excessive resistance on Vent valve control circuit

What does the code p0449 on a GMC mean?

P0449 GMC Meaning The Engine Control Module (ECM) monitors the Evaporative Emission System (EVAP) Vent Valve/Solenoid system wiring for opens or shorts. The ECMsets the OBDII code when EVAPVent Valve/Solenoid is not to factory specifications.

What to do with a p0446 OBD-II trouble code?

With a P0446 OBD-II trouble code, here are some things to try: Replace Vent valve. Repair open, short, or resistance problem in control circuit. Repair open, or short, or resistance problem in power circuit.

How is the p0446 GMC evaporative emission vent system performance?

The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAPsystem then monitors the vacuum decay rate. P0446 GMC More Information Need more information on how to fix the P0446 GMC code? Get Access to Factory Service Manuals Need more help?

Why does my GMC Silverado have a p0446 code?

Here’s a series of steps that worked for me to eliminate the P0446 code on my 2006 Silverado 2500HD 6.0. This code most often refers to a blockage in the EVAP vent system. This code is not associated with a bad gas cap or faulty EVAP Purge solenoid (on top of the intake manifold).

What does it mean when p0446 is triggered?

When P0446 is triggered, the ECM has detected a short in the circuitry to activate the vent control valve, or the EVAP system failed to maintain the proper pressure during the active EVAP leak test. What Are The Symptoms Of P0446?

Code P0446 sometimes indicates that an electrical failure has been detected in either the vent valve itself or its control circuit.

What does the p0446 code on a Toyota mean?

P0446 TOYOTA Meaning. The Evaporative System (EVAP) canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON signal, the coil in the solenoid valve is energized.

What happens when the ECM detects code p0446?

When to repair a check engine light p0446?

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. Scan your vehicle to verify P0446 is the only code present.

What are the common causes of DTC p0446?

DTC P0446 is defined as “Evaporative Emission (EVAP) Vent Control Circuit Malfunction.” What are the common causes of code P0446 ? Depending on year, make, and model, DTC P0446 may have number of causes. Here are some of the most common.

What is the OBD code for vent malfunction?

P0446 OBD-II Trouble Code: Evaporative Emission Control System Vent Control Circuit Malfunction. Cost of diagnosing the P0446 code. P0446 is a diagnostic trouble code (DTC) for “Evaporative Emission Control System Vent Control Circuit Malfunction”.