What is an evaporative emission system purge control valve circuit?
The evaporative control (EVAP) system collects raw fuel escaping from the fuel tank. This information is then communicated to the ECM which regulates the emissions of the vehicle. The P0443 code is set when the ECM detects a malfunction within the purge control valve or a short in the purge valve circuit.
What is purge valve circuit?
The EVAP System and Purge Valve The heart of the system is the charcoal canister—a device that traps the fuel vapors when the engine is off. The vapors are then burned during the normal combustion process. The PCM monitors the integrity of the purge valve and the valve’s control circuit.
How much does it cost to replace purge valve?
To have your canister purge valve replaced, you will pay anywhere between $110 and $170. The parts are the expensive component here, as they will run between $75 and $110. The labor, on the other hand, usually only costs about $50, meaning this is a rather quick and straightforward procedure.
How do I know if my purge valve is bad?
5 Symptoms of a Bad Vapor Canister Purge Valve (and Replacement…
- 1) Check Engine Light.
- 2) Rough Idle.
- 3) Trouble Starting Car.
- 4) Poor Engine Performance.
- 5) Emissions Test Failure.
What can a bad purge valve cause?
Engine Problems. If your canister purge valve is stuck open, however, it creates a vacuum leak that can affect your engine adversely. This will change the car’s air to fuel ratio, and can cause rough idling (car feels rough and bouncy when the engine is running), as well as difficulty starting.
What is evaporative emissions system?
The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions…
Where is the EVAP emission canister?
The EVAP emissions control canister is located on the driver side, near the rear tires . Jack up the vehicle from the recommended jack placement and place the rear of the vehicle on jack stands for support. Make sure to keep pressure on the jack after lowering the vehicle onto the jack stands for extra safety.
How does a purge valve work in an EVAP system?
EVAP Purge Valve Operation. A flap in the EVAP purge valve body restricts the motion of fluid and is magnetically attracted by the voltage applied via the valve’s electrical contacts. The flap is attracted to a coil in the evaporative purge system, which closes the valve and blocks the passage of fluids.
What is an EVAP system Purge and vent solenoid?
It is the job of the EVAP vent solenoid to allow air into the charcoal canister so that the EVAP system can pressurize and function properly. When the solenoid is opened, air is allowed into the EVAP system to relieve any pressure that may be present as a result of purging the EVAP system.