Have you tried resetting the light to see if the same code comes back on? As far as your question, if it runs good, I would say the ECM is failing to read it and chances are there is a wiring issue.

Let me know.
Joe

Answered by Jacobandnickolas (expert)
57,318 answers provided

Thanks Joe. I will reset it and see. We have not tried that, just got the car yesterday. The light came on when I was headed to get the inspection sticker, of course! Brought it to the AutoZone just to get the codes read, and of course they tried to sell me a new ECM. Of course I wanted to consult this site first because you guys are awesome!

Response from geauxtigers
12 questions asked

Reset the computer and after 25 miles the light came back on. The motor is running strong, not sure what the computer is picking up. Hate to buy a new computer and the problem be some loose wire. Guess its time to give up the do-it-yourself and bring to a mechanic for proper diagnosis? Then again, that may cost more than the computer!

Response from geauxtigers
12 questions asked

IF the vehicle is still running good, something tells me the codes they are giving you are not correct. The original codes you gave me would have caused the engine to run poorly. Infact, I question that it would hardly run at all. I have to be honest, I just finished another one similar to yours and it was the ECM, but that car wouldn't hardly run. I think you need to get the computer rescanned to see if the same codes are the issue. Usually, when the light comes on and the vehicle is running properly, it is an emissions issue.

If you have it rescanned, let me know what codes or (if they are the same) are found. Something doesn't sound right to me.

Joe

Answered by Jacobandnickolas (expert)
57,318 answers provided

Thanks. I agree, the codes it was given me didnt fit with what the car was doing. But this one runs strong. I have been digging around this morning and noticed that the electrical connector to the ignition coil (the bottom one nearest the terminal) is very loose. I can move it back and side to side. Could this be creating an issue. There was also some moisture in the connections. The previous owner recently had the water pump changed and since this part is right next to the pump, just wondering if maybe the combination of the loose connection and moisture is causing the funny faulty codes? Your thoughts?

Response from geauxtigers
12 questions asked

It could be. Can you make the connection a little stronger somehow?

Answered by rivermikerat (expert)
5,494 answers provided