How do you turn off the maint.required light - 1989 Mitsubishi Mighty Max

The '91 & newer models turned the maint, req. light on by a timer in the ECU & the ECU turns it on around 120k miles based on a timer and requires a dealer or shop visit to be reset.But it isnt going to hurt anything by being on.

1. To reset MAINT reminder light after engine oil replacement, turn ignition switch to OFF position with odometer reading showing. Turn ignition switch to ON position while holding down trip meter RESET button.
2. Hold trip meter RESET button down for at least 5 seconds. Odometer should indicate "000000" and MAINT reminder light goes out.

The vehicle has either reached the mileage necessary for oil change and other maintenance, or whoever performed the last service did not reset the computer.

Its for an oil change and the way you reset it is put the trip on odometer hold the trip odometer button and turn the key to the on position and lines will blink in the place the numbers should be then it will go off

There are manufacturer recomended service/maintence requirements at
certain mileage intervals. These are programed into the cars computer.
The light is to remind you, that you have reached or close to one of these intervals. There should be a maint. schedule with the owners
manual, that describes the type of service required, at your mileage.
If you just want to turn off the light. Stop by any major parts store and
they will clear the code. Usually for free. Hope this helps.

open the slide out where your fuel/ trunk opener are.
the trip/reset button are there. turn the ingnition on without having your foot on the brake, while holding the reset button. the maint light will flash 5 times or the "resetting oil maint" message will appear. hold the reset button until it finishes. if you have nav you will need to go into "info" then maint and rest the mileage in the nav screen. you owners manual also has these insrtuctions in it

To reset the system. Turn the ignition key to the "OFF" position with the odometer reading shown. Turn the ignition key to the "ON" position while holding down the trip meter reset knob. Hold down the knob for at least 5 seconds. The odometer indicates "000000" and the light goes off. If the system fails to reset, the light will continue flashing.

Hold mileage reset button down and turn key on. continue to hold button until dashes stop flashing and light goes out (approx. 10 seconds).

Un hook the battery for 5 minutes the ground and then replace

To reset the MAINT REQ'D light, press and hold the select/reset button on the right side of the instrument panel. Turn the ignition on and hold until the light goes out.

This should get rid of the service light.

Joe.