Question about 1991 Mitsubishi Mighty Max
How to turn off the maintenance light on a 1989 Mitsubishi Might Max?
First I'd say try taking the battery cable off the negative terminal to reset the computer.
Then what I would do is pull the codes from the computer. Autozone will read your codes for free! If the Check Engine Light (MIL) came on after you have already reset the ECU, the computer stored a code. Even if the MIL goes out, the code will remain stored in the computer.
It might be something as simple as an oxygen sensor, but the best way to do things is find out the code, then to try to clear it, if the problem persists then the CEL (check engine light) or maintenance light will simply come back on.
Posted on May 24, 2009
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Posted on Jan 02, 2017
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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
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