Question about 1991 Mitsubishi Mighty Max

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Maintenance light stays on

How to turn off the maintenance light on a 1989 Mitsubishi Might Max?

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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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Mitsubishi Mighty Max has 170,000 miles on it and maintenance light came on and will not go off


Yes, unplug the battery for 30 seconds, and the ECU will reset. If the light comes on again, get the error code read to see what the ECU thinks is the problem. At 170,000 miles, this is likely burning oil causing a misfire, might be the engine temp sensor wires are broken (causes hard starts when cold), might just be low power steering oil or even worn brake pads causing a low brake fluid level.

Apr 04, 2014 | 1995 Mitsubishi Mighty Max

1 Answer

How do I go about manually resetting the maintenance required light on my 2.4L 1992 Mitsubishi Mighty Max pickup truck?


When service to the emission control system has been completed slide the switch to the opposite position, turning off the warning light.
If the service was for the 120,000 mile interval remove the warning light bulb.

CAUTION: If the speedometer is to be replaced set the odometer to the same reading as the odometer being removed. (consult your local motor vehicle laws)



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Aug 25, 2013 | 1992 Mitsubishi Mighty Max

1 Answer

Hoe do you reset maintenance engine light


You need a scanner to reset light or go to parts store.

Feb 07, 2013 | 1989 Mitsubishi Mighty Max

2 Answers

How to reset maintenance required light for 1991 mitsubishi mighty max


there is a small switch behind one of the switch blank off plates to the right of the steering column. It is a very small switch about 6" deep into the dash, hard to find easy to reset.

Nov 12, 2010 | 1990 Mitsubishi Mighty Max

2 Answers

My maintenance required light is on...1994 mighty max...i added oil, what else do i check?


just learned this morning, there is a switch on the side of the steering column that has a cap over it. The light comes on at certain mileage so you know when to get big things done, like new timing belt. Check your manual for maintenance due, then open that cap and flip the switch inside to shut the light off.

Oct 04, 2010 | 1994 Mitsubishi Mighty Max

1 Answer

What does the maintenance required light mean on a 1991 mitsubishi mighty max? and how do you turn it off? What is the regular maintenance for this truck?


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.

Oct 03, 2010 | 1991 Mitsubishi Mighty Max

1 Answer

How do you shut off the "maintenance Req" light on the instrument panel? 1988 Mitsubishi Mighty Max


There is a small switch located on the back of the innstrument cluster on the speedometer near where the cable mount to. remove the cover off of the cluster, sometimes easiest to locate a night (makes it easier to see) with a flash light looking in thru the windshield, simply click switch back over, after 25K miles you'll need to do again.
Please let me know if this had assisted you.
Thanks,
Tom

Aug 27, 2010 | 1988 Mitsubishi Mighty Max

1 Answer

How to turn off maintenance light.


the best way is to carry it to auto zone they will do it for know cost most of the time,if there is know problems going on with system you can remove your positive battery cable wait few minutes then reinstall but best to have reset with computer diag

May 24, 2009 | 1991 Mitsubishi Mighty Max

1 Answer

Maint reqd light stays on


From what I remember with my Mighty Max '90, if you remove the dash panel , the one with the cluster gauges, you will find a push button that resets the engine maintenance light. It's a thing that wont reset by itself and lights up at specified mileage that is reached by the odometer. Usually the mechanic that does the work indicated by the light will reset it when the work is done. The red light might indicate a serious problem, so before you ignore the possible problems it might indicate, eliminate the the serious ones before you reset. The trick is to get the dash panel off.

Mar 23, 2009 | 1990 Mitsubishi Mighty Max

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