What happens when the EGR solenoid valve is activated?
When the EGR control solenoid is activated, a passage is opened up that allows exhaust gases into the intake manifold. The EGR solenoid is controlled by the engine computer, and activated at very specific times in order to achieve the best performance, efficiency, and emissions from the engine.
Can EGR valve cause engine misfire?
A bad EGR valve may cause random engine misfires if it is causing a vacuum leak in the engine. This can cause a vacuum leak in the intake manifold that can cause an intermittent engine misfire.
When to replace or clean the EGR valve?
Or, the EGR position sensor can fail, causing a check engine light. If your car is running fine at idle and you don’t have a check engine light, there’s no need to replace or clean an EGR valve. Some shops recommend periodic cleaning. I think that’s a waste of money.
What does a check engine light mean on an EGR solenoid?
Check Engine Light comes on. An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue. A bad EGR solenoid can cause a variety of different trouble codes,…
What’s the code for an EGR valve throw?
What code will an EGR valve throw have? The P0401 trouble code is related to your car’s exhaust gas recirculation (EGR) system, which controls an engine and reduces emissions. Suppose a computer-controlled valve gives a certain amount of gases back into your engine to be burnt with the air-fuel mixture.
Is there a position sensor on an EGR valve?
Vacuum controlled valves don’t have a position sensor to monitor how much the pintle actually opened or closed compared to how much the engine computer wanted it to open or close. When car makers converted over to electrically operated EGR valves, they installed position sensors to get feedback as to actual versus commanded position.