Question about 1991 Chevrolet S-10 Blazer

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Service engine light

Could you tell me how to reset the "service engine" light, after I have changed the spark plugs?

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Take the positive post off of the battery for 5 minutes, put it back on. If the light comes back on again, it's most likely either the knock sensor or the O2 sensor.

Posted on Nov 17, 2008

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You will have to have a scan tool. was the light flashing ?does the truck run better?

Posted on Aug 26, 2008

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Hi

Thanks for using FixYa. The check engine light is on because ECM (Control Module) detected a fault with your car's system. ECM has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and your car needs to be looked at. You'll need to get the codes checked from a nearby dealer/mechanic. Please revert with the codes so that I can tell you where exactly the issue is.


Please do rate the solution and revert for further assistance.


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Service engine soon, SLIP, TC OFF LIGHTS ON


I had the same indications on My 2000 Maxima but the engine was also running rough . I replaced the number 3 cylinder ignition module and all of the spark plugs and all of the error lights are back to normal I had to reset the check engine light by disconnecting the battery for about 15 minutes.By the way my car has 253,000 miles on it so if you have a lot of miles on your car you might want to check all of the ignition modules so pull your spark plugs and read them they might tell you where your problem is .

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