Why does my Chevy Silverado have a p0446 code?

Vapor Canister Purge Valve – One of the most common causes of the P0446 code is the vapor canister purge valve. It’s really easy to replace. There are a few clips that you need to find and remove.

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.

Why does p0446 cause fuel tank to crack?

Building their nests in the vent line blocks the flow, some of them so bad that they cause EVAP DTCs to be set, including P0446, and some so bad that they’ve caused canisters and fuel tanks to crack.

Can a p0446 code cause a gas smell?

P0446 code will typically not be accompanied by any noticeable symptoms. The service engine soon light will come on, but that is usually about it. You might (not very likely) notice a slight decrease in fuel economy. P0446 may also cause a slight gas smell.

What does trouble code p0446 on Chevy Silverado mean?

P0446 -What Does It Mean? (1999-2006 V8 Chevrolet Silverado, GMC Sierra) A trouble code P0446: Evaporative Control System Vent Valve Performance usually points to a blocked EVAP vent solenoid that isn’t able to draw fresh air into the EVAP carbon canister. In this tutorial I’ll explain what this trouble code means.

How does the p0446 Chevrolet evaporative emission vent system work?

P0446 Chevrolet Meaning. The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system then monitors the vacuum decay rate.

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?