What does a canister valve do? What are the symptoms for a malfunctioning canister purge device? What are the causes of EVAP system failures or malfunctions?
What is the function of the Canister Valve
The canister purge is a common emission control component used in the Gasoline Vapor Emission Control System (EVAP) Many modern vehicles. The EVAP system’s purpose is to stop large amounts fuel vapors escaping into your vehicle.
Some gasoline vehicles will always have some gasoline vapor in their fuel tanks. To reduce pollution, the EVAP system captures and circulates this vapor. The EVAP system prevents the release of gasoline vapor to the atmosphere and ensures that the stored steam can be used for fuel.
The canister purge is responsible for sending stored gasoline vapor into the engine. It is located between the intake manifold and the EVAP container. The engine computer of newer vehicles controls it. When the engine is turned off, the valve closes. The computer opens the valve periodically or continuously when your engine starts to turn. This allows the carbon cabin’s fuel vapor to be burned inside the engine.
There are many names for the canister valve, including canister filter and gas tank air release solenoid.
What are the Signs and Symptoms of Canister Valve Problem?
Dust and dirt can cause the canister valve to become blocked over time. The environment can cause cracking. If the valve fails, the EVAP will stop working properly and cause problems that can affect certain emission levels.
A defective canister valve may cause driving problems.
1- Idle Irregularity
A faulty canister valve may cause idling irregularities, which is one of the first signs. A vacuum leak can occur if the canister purge valve fails to open. This will cause the engine to idle slower.
2- The vehicle must be hard worked
Hard starting is another common sign of a defective canister purge valve. Vacuum leakage can cause the vehicle to have trouble starting if the valve fails. Vacuum leakage allows air to escape from the engine. This can lead to performance problems by affecting the air/fuel ratio.
3-Engine Check Warning Lamp On
The check engine light can be illuminated if the canister valve is not working properly. The check engine warning light will be illuminated if the ECU detects an issue with the voltage signal from the canister valve. Common error codes are P0441, P0446 and other EVAP codes. The OBDII diagnostic instrument can be used to check and correct errors.
4- Engine Performance Problems
You shouldn’t expect perfect ride comfort if your vehicle has a defective canister valve. You will have poor engine performance if the canister purge valve remains open. Your engine won’t produce the power required to accelerate when you press the accelerator pedal. Instead of your vehicle accelerating as soon as you press the pedal you’ll notice that the vehicle is moving slower.
5- Emissions Testing Problems
You have seen that the canister purge valve sends fuel vapors back into the engine. This prevents toxic hydrocarbons being released from the exhaust pipe. Failing canister valves cannot stop fuel vapors escaping. The emissions test may fail. If this happens, inform your mechanic to inspect the canister valve. If the canister valve is worn or damaged, replace it immediately. This will allow you to pass the emission test.
