Emissions light

JnJ · Apr 2, 2006

So, the emmissions light is on in the 89 MJ. Is this the one set off by a certain milage? What should I look for before just pulling the bulb.

This thing has been through a ton of changes, started as a 2wd and is now a 4wd with a complete drive train and front axle swap.

Thanks

langer1 · Apr 2, 2006

It means it time to replace the o2 sensor, that could save some fuel.

JnJ · Apr 3, 2006

So that is the only possibility?

JnJ · Apr 30, 2006

langer1 said:
It means it time to replace the o2 sensor, that could save some fuel.

Ok, still need help, spent the $$ to replace the O2 sensor and the light is still on. Any other ideas?

JnJ · Apr 30, 2006

Ok, just disconnected the emmissions light timer under the dash and the light is out. I know the manual says you have to replace these, but has anyone tryed taking one a part and re-setting it?

bajacalal · Apr 30, 2006

I believe the renix emissions clock has to be manually reset (no idea how to do that) or simply disconnected once it turns on. Its there to prompt you to replace the O2 sensor but doesn't turn off automatically when done.

imma honky · Apr 30, 2006

Scan tool should be able to resest it.

klonestar · Apr 30, 2006

I just unpluged my timer and no more light!

AJPulley · Apr 30, 2006

If I'm not mistaking, it is a throw-away part- there is no resetting it. It is part number 5600 2460 if you feel the need to replace it, but most guys just toss it.

whatevah · May 1, 2006

FWIW, if you recently splashed through a very big puddle and got water in your engine, that could have set it off. I watered my engine a month ago, but got lucky with just a misfire. the emission light was on, and the code reader said it was because of a misfire.

AJPulley · May 1, 2006

whatevah said:
FWIW, if you recently splashed through a very big puddle and got water in your engine, that could have set it off. I watered my engine a month ago, but got lucky with just a misfire. the emission light was on, and the code reader said it was because of a misfire.

He has the Renix system. It is not possible for water to set off the light as it is a simple, separate module located under the dash that has an internal timer. After so many miles, it illuminates a light for the purposes of reminding the operator to replace the oxygen sensor.

langer1 · May 1, 2006

whatevah said:
FWIW, if you recently splashed through a very big puddle and got water in your engine, that could have set it off. I watered my engine a month ago, but got lucky with just a misfire. the emission light was on, and the code reader said it was because of a misfire.

89's don't work with a code reader, the only light is turned on by a timer.
Oh and I.m pretty sure it has a reset button.

artsifrtsi · Jan 30, 2007

Guess it's time to dig into the FSM... gotta find this module and make it die.

sjx40250 · Jan 30, 2007

It is under the dash. Mine is a translucent smokey colored case with gears in it, connected to the speedo cable. All manual.
I took mine apart to reset, then saw that if I was careful, I could have reset it with a small screw driver. Its been a few years since did that. It goes off after 80+k miles.
Dealer only replacement. It is inteneded to have you check or replace your O2 sensor.
Do a search. You may find more.

Emissions light

JnJ

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langer1

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JnJ

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JnJ

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JnJ

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bajacalal

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imma honky

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klonestar

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AJPulley

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whatevah

It's Yellah!

AJPulley

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langer1

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artsifrtsi

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sjx40250

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