Question about 2003 Chevrolet Impala

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I HAVE A 2003 IMPALA -I REPLACED THE EGR AND THE COMPUTER -AND STILL THE CHECK ENGINE LIGHT COMES ON AND WHEN IM AT A LIGHT OR STOP SIGN WHEN I PRESS THE GAS TO TAKE OF IT HAS A SLOW HESITATION AND JUMPS THEN IT GOES WHAT CAN THIS BE-HELP SPENT SO MUCH MONEY ON PARTS I THINK I DIDNT NEED.

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Nee toreset programe

Posted on Mar 26, 2011

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How can i stop my security light from coming on when i start my 2004 3.4 liter chevy impala ?


Hi Glenn, did you by chance replace your PCM with a used computer? If so you will need to have it reflashed, If not sounds to me like the Passkey security needs to be relearned. Also wondering why you replaced PCM after replacing EGR valve, Please if you can give me some more info on your veh. Body control module controls security so something is not right. Please get back to me, Thanks Randy.

I’m happy to assist further over the phone at https://www.6ya.com/expert/randall_d932ef6e01588b0f

Mar 14, 2015 | 2004 Chevrolet Impala

1 Answer

Engine light reads faulty or blocked egr valve after having egr valve replaced


Make sure the actual hose is not plugged by blowing through it.

Jan 08, 2013 | 2003 Chevrolet Impala

1 Answer

My check engine light keeps blinkin on my 2003 chevy impala and keeps shakin


Take it in, a blinking check engine light is not a good sign. Solid yellow is ok, blinking yellow or red is in need of service. Get the codes checked asap.

Feb 12, 2011 | 2003 Chevrolet Impala

1 Answer

I have a 2003 chevy impala i changed the egr valve and my check engine light is still coming on and a part store read my code and it said egr valve what else could be the problem


The code in the ECU might not have reset after you changed the EGR. Try unhooking the battery and let the car sit for a couple minutes and then hook it back up and see if the light goes away.

Mar 04, 2010 | 2003 Chevrolet Impala

2 Answers

I have a 2003 Chevy Impala that is giving me problems. It's sputtering when idling and slowing down, has stalled a couple times at a traffic light. Sometimes has a knocking sound, when in reverse the...


I suggest changing your egr valve. I have a 03 impala with the same problem and check engine light came on and through the code for the egr valve. they are 154 at autozone

Dec 17, 2009 | 2003 Chevrolet Impala

2 Answers

P0300 code (worst nightmare)


A flashing light means there is a serious misfire that increases vehicle emissions, according to the dealer book. But I remember our was corrected after I changed the plugs and wires. That is the cheapest and problem the most commen solution. Then, I might try the EGR valve and gasket, still fairly inexpensive (under $100 for aftermarket, about $110 total for dealer part), and relatively simple to replace. One of those two should do the trick.

Mar 20, 2009 | 2003 Chevrolet Impala

4 Answers

Loosing power


Wow, I just went through the same problem and guess what it was a clogged converter and a bad oxyegen sensor. The garaged fixed it up for me by putting an eco converter on it and a new O2 sensor. I have a 2003 Chevy Impala,V6 3.8 engine. Good Luck!!!!

Aug 18, 2008 | 2003 Chevrolet Impala

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