Q: Why would my check engine light continue to come on after replacing the EGR valve in my 2004 Chevrolet Impala

asked by on

The check engine light came on in my car with an EGR valve code. The valve has been replaced three separate times, with the check engine light continuing to come on after a few miles of driving. I would like to know if there are possible external sources that could be causing the EGR valve to fail. Thank you.

My car has 118000 miles.
My car has an automatic transmission.

Hello. I would need to know which EGR code you are getting in order to be able to precisely tell you what may be going on. Most of the time if replacing the EGR valve does not solve the problem it is because there is a clog in the EGR passages or possibly a failure in the circuit. Both of these can easily be tested. If you need assistance with fixing this issue, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the EGR system is not working right] https://www.yourmechanic.com/services/check-engine-light-is-on-inspection

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Why would my check engine light continue to come on after replacing the EGR valve in my 2004 Chevrolet Impala

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Sunroof doesn't work

The sunroof could fail for either electrical, or mechanical reasons. The sunroof module takes inputs from the switch. It then uses this information to control the sunroof motor through a dedicated relay. A problem anywhere in this system could prevent...

Q: Car misfires when the weather is cold and while idling

Hello. Thanks for writing in about your 2000 Lexus SC400. It may be necessary to replace all of the ignition coils in addition to having the ignition coil wiring inspected for damage in order to determine why your engine is...

Q: Clogged manifold intake runner bank 1 2005 Mercedes C230 Turbo

Hi - the clogged intake is a long-term "carbon clogging" from the turbocharger/EGR valve operation. The manifold must be removed, disassembled, cleaned and reinstalled. Tedious, and requires moderate DIYr skills. Unfortunately, this is not a service YourMechanic offers at this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...