Check Engine Light

[dlbehrns]

Has anyone experience an itermittent check engine light? Mine came on the other day for a couple of days and then this a.m. nadda. Feedback?

[MarcusF]

A code reader will tell you.

[sfclk]

I'm guessing it's an O2 sensor.

[dlbehrns]

Code reader would work if the light would come back on. But it won't. I have less than 20K on the car.

[sfclk]

Originally Posted by dlbehrns

Code reader would work if the light would come back on. But it won't. I have less than 20K on the car.

My $65 scanner was able to read past malfunctions when the CEL has already went off.

[MarcusF]

Not only does the ECU store codes after the CEL has turned off, but some codes can only be cleared by SDS - and thats even after the offending part has been replaced and the battery been disconnected. A code reader will do the job.

[consumerpi]

Correct. Get a code reader even if the light has turned off - you'll still be able to get a code from the reader.

Originally Posted by sfclk

My $65 scanner was able to read past malfunctions when the CEL has already went off.