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How do I fix code P0446?
Gas caps are relatively inexpensive and are often the fix for code P0446. If the fuel cap didn’t fix it, perform an EVAP system leak check: Pinch off the vent tube to the EVAP Vent Control Valve. Pressurize the EVAP system with an EVAP smoke machine leak checker.
What could cause a 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.
Can a bad gas cap cause P0446?
A broken, damaged, or improperly installed gas cap most commonly raises the P0446 code. However, other, less common causes can also arise.
Where is the evaporative emissions vent control valve?
In most cars, the EVAP vent valve is located underneath the vehicle, close to or at the charcoal canister near the fuel tank, see the photo. For that reason, it often fails due to corrosion. The most common problem with the vent valve is when it sticks open or fails.
What code is po446?
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.
Where is the EVAP fuel tank pressure sensor?
The fuel tank pressure sensor is part of the fuel pump assembly and is mounted on top of the tank or inside the tank. It’s part of the evaporative emissions system (commonly referred to as “EVAP”) and reads pressure in the fuel system to detect evaporative leaks, such as a loose or faulty gas cap.
What does p0446 mean on a Chevy Tahoe?
P0446 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing (Tahoe or not). The code technically stands for:
What does the code p0446 mean on a vent valve?
Code P0446 sometimes indicates that an electrical failure has been detected in either the vent valve itself or its control circuit.
Why does my Lexus have a p0446 code?
In a Lexus and Toyota, the code P0446 may point to a failing vacuum switching valve. This problem is very common to models from the two Japanese marques. The malfunction indicator light turns on if you get a P0446 Code. What are the Common Symptoms of the P0446 Code? Anomalies in the EVAP system often come with symptoms that you shouldn’t ignore.
What is the trouble code on my Chevy Tahoe?
P0446 Chevy Tahoe. August 7, 2018. One of the most common trouble codes with the Chevy Tahoe is the P0446 code. This trouble code references a number that is given to you when you plug your Tahoe into a OBDII scanner.