Chevy Blazer
Check Engine Light
Pontiac Sunfire
1995-2005 Chevy Cavaliers

Why did the service engine soon light come on in your 1997 Blazer when it seems to be running fine?

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Wiki User
2005-09-09 01:11:17
2005-09-09 01:11:17

This usually has to do with air flow into your engine. Check your air filter, egr valve, or your oxygen sensor. Most likely you haven changed your ir filter for a while. Give your vehicle time to reset itself through the on bord computer.

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