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

asked by on April 19, 2017

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.

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

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

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What does it mean if the Supplemental Air Bag warning light is on in the dash?
The supplemental restraint system (SRS) is designed to help keep you and your passengers safer during certain collisions. If the Supplemental Air Bag light is on in the dash, it indicates a problem with the system. The light should turn...
Where is the fuel pump shut-off switch located?
Your car may have a fuel pump shut-off switch. This switch turns off the pump that sends gasoline from the fuel tank to the engine. It’s designed to activate during certain situations, such as during an accident. If you’ve been...
Air conditioning stopped working, and car overheated
Sounds like a hose busted from your radiator and the fluid leaked out of the radiator. If the AC stopped working you may have broken a serpentine belt you will notice the alternator light come on the dash if that...
Car keeps stalling
Hello. It sounds like your problem lies in the fuel/air mixture going to the carburetor. If the fuel/air mixture is not accurate, the idle needs to be checked with a vacuum gauge and adjusted to the proper idle and vacuum...
Water pump broken
There can be many symptoms of a bad water pump. Most of the time, when the pump fails it is because it has started to leak. It can leak when the engine is running or when the vehicle sits, but...
Tranny erratic shift if the problem is in the tcm would it throw a faulty tcm code ?or not all the times this happens.
Hello and thank you for contacting Your Mechanic. The code P0760 (https://www.yourmechanic.com/article/p0760-obd-ii-trouble-code-shift-solenoid-c-malfunction-by-valerie-johnston) means that the shift solenoid "C" is operating irregularity. The code P0870 means that the transmission fluid pressure is not determined at its specified pressure. Check the harness...
Spike in costs around 120,000 miles?
Hi there. Your question of what to expect in service costs is difficult to answer. There are variables involved, whether the vehicle was driven hard by the previous owner(s), or whether the vehicle has had maintenance performed at the recommended...
My 1994 nisan maxima was running fine when it was parked 2 yrs ago now its missing I even put new plugs and wires on it still my
If the car has sat parked for 2 years with fuel left in the fuel rail and gas tank, be sure the fuel tank is thoroughly emptied BEFORE you add fresh gas. The injectors are probably plugged with varnish and...
What would cause oil to blow everywhere in my truck.
Hello. I would need to know what kind of vehicle this is to be able to give you some specific information. Typically if a serious oil leak occurs all of a sudden, and if nothing was hit, then you may...

Related articles

P3487 OBD-11 Trouble Code: Cylinder Exhaust Valve Control low
What What the P3487 code means This code indicates that there is a problem with the exhaust valve on cylinder number 11. Your vehicle’s powertrain control module (PCM) can recognize that the measured values of the mass airflow sensor, the...
P0709 OBD-II Trouble Code: Transmission Range Sensor Circuit Malfunction
P0709 P0709 code definition The P0709 code is known as Transmission Range Sensor Circuit Intermittent. What the P0709 code means The meaning of P0709 varies slightly among makes and models, but in general, this code indicates that the PCM (powertrain...
P2060 OBD-II Trouble Code: Reductant Injector Air Pump Control Circuit Low
P2060 means there is an issue with the particulate filter (diesel engine) or the catalytic converter (gasoline engine) often due too corroded wiring.