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Re: 1990 s-10 2.8 FI check engine lite is on what do i...
Get an OBD1 reader, and learn how to check for codes...blinking lights...long blink...short blink...gotta count them and the manual will tell you what the code is for.
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When the engine light comes on, the tcs automatically comes on too, until vehicle is re-started. Once you fix the issue with the engine light , tcs won’t come on anymore.
Sometimes disconnecting the battery for a few minutes will reset the check engine light. Make sure you have the correct radio code before doing this or your radio will not work after disconnecting the battery.
If you disconnect the battery for 1 minute and reconnect it the check engine lite will reset. when you start your vehicle again the lite shouldn't be on unless the problem is still present. If the problem is still there the lite will come on again and you should take it in to a shop and have it diagnosed for engine codes and see what the problem is.
Try disconnecting the battery first though before you go spending great amounts of money on something that was probably just a minor glitch in the computer.
Bets of luck and let me know if this has helped you.
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