Often asked: What Would Cause A Car Computer To Say Egr Valve After Replacing It?

How do you reset the check engine light after replacing the EGR valve?

It’s best to reset the check engine light with a scan tool but disconnecting the battery for a few minutes will erase all memory and turn off the Check Engine light, make sure you have radio security code prior to removing battery connection.

What does EGR mean on a code reader?

Code P0401 Meaning The exhaust gas recirculation (EGR) recirculates small amounts of exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides.

Do EGR valves need programming?

No they don’t require programming. Provided you have fitted the correct EGR and the wiring was ok you can reset the EGR adaptive values or programming values using the clip but this wouldn’t stop it from working.

How do you test an EGR valve?

How to Test an Electric EGR Valve

  1. Turn the vehicle off and remove the key from the ignition.
  2. Open the hood and locate the EGR valve.
  3. Turn the multimeter on and set the dial to “Volts DC.” Attach the red lead wire to the EGR circuit labeled “C.” There are five circuits on the EGR and each is labeled A-E.
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What is the code for a bad EGR?

Code P0401 means that the computer detects insufficient exhaust gas recirculation (EGR) flow in the system.

What does a bad EGR valve sound like?

You hear knocking noises coming from the engine Knocking noises from the engine can be caused if the EGR is constantly closed. This is because at low rpm the fuel ignites early when it meets the high temperature. Detonations are also common as a second ignition can occur after the normal ignition.

Will a bad EGR throw a code?

Question: If I have a bad EGR valve, will it throw a code for a misfire in cylinder number 2? Answer: A bad valve most likely will cause a random misfire since it doesn’t direct exhaust gases to a particular cylinder.

Can you drive with P0401 code?

Hi There, Code P0401 relates to the EGR valve flow. When this code is triggered, the computer has detected that the flow is insufficient. Driving the car until next week will not cause any harm, although the vehicle may not run well.