Engine Electrical: "Check Engine Light"
Automotive Questions and Answers - Page1

It would act as if someone had turned the ignition off and back on again. Then the "service engine soon" light comes on, and the engine has no power...more

Large vacuum leak or bad O2 sensor. When looking I noticed a very strong gas odor coming from the engine and that the EGR valve had a line...more

Code 22 is low voltage on the throttle position sensor. If I replace the TPS will that solve my problem? Right now, the truck will idle at very high rpm and stall...more

Since then my check engine light has gone off. I still would like to replace the sensor myself, so how would I do that right, or should I take it in to be done instead?...more

"Service engine soon" light comes on when driving. My service manual tells me there's an "ACLR module" from which I can jump A to B to receive a code isolating the problem...more

No Diagnostic Trouble Code was stored in the Engine Control Module's memory, that narrows things down quite a bit...more

The service light code said EGR was the problem. I replaced the EGR solenoid and made sure the valve actually moves. While I was at it, I also replaced the vacuum hoses. If I drive slowly around town...more

The service engine soon light came on and I had it checked at a repair shop. They told me it was bad gas so I added a fuel treatment...more

I brought it into the dealership service department. They told me the reason the light came on was because the gas cap wasn't tightened...more

I've been having all kinds of problems, and recently had a garage check it for trouble codes. They came up with a 36, 62, 65, 78, and a 99. What do these codes mean?...more