Why does the check engine light come on
1,275

Asked by demontoad117 Jul 04, 2012 at 11:23 AM about the 1991 Chevrolet S-10 RWD

Question type: Maintenance & Repair

Ill be driving over 80kmh and my service engine
light comes on, then after about 45 minutes it
turns off. When the light is on i feel the engine
lag almost like a very short sputter. Could this be
bcs of my exhaust leak causing compression
problems or another issue?

5 Answers
1,275

demontoad117 answered 11 years ago

Tom, i got the obd reading and its my oxygen sensor bcs i have a exhaust leak @ high speeds my sensor senses a problom and trys to adjust the mix causing the fluctuations in my engine.... This came straight fromm the tech.

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240

mikesrkn answered 11 years ago

If you go to an Autozone they will check your check engine codes for free. You can then look up the code online to hep diagnose.

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1,785

DeBo13 answered 11 years ago

This was happening to my S-10. Problem was a weak/bad spark plug. Engine codes should tell you that for sure!

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