Question about 1991 Geo Tracker

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How do you read the codes on a 1991 geo tracker? How do you turn the check engine light off?

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  • Geo Master
  • 8,266 Answers

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.

Your terminal is under hood, passenger side, rear side of strut tower, mounted on tower

Posted on Oct 01, 2010

  • kick-fix Jan 29, 2011

    no the DLC jumper is in front the battery , in 91, only 1 motor then, sorry , no guessing.
    4 pin conn. with rubber cap.http://www.kick-fix.com/ free page, all you need is there. up to 1998

    all pics there.

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  • Master
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You require engine code reader machine to read and diagnose problem repair it then clear error codes to turn check engine light off

Posted on Oct 01, 2010

  • kick-fix Jan 29, 2011

    so much for guru.
    no 91 made by Suz can use a code reader only paper clip jumper'
    see here http://www.kick-fix.com/ free page, all you need is there. up to 1998


    click CEL page.
    im the real guru. of guru's hehehehehe

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Posted on Jan 02, 2017

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SOURCE: reset check engine light on 1995 geo tracker

I had the very same problem with my 94 tracker and it turned out to be something simple. My check engine light had popped on after it had hit 100,000. I went through all of the suggestions that people had suggested (unplug battery......etc) and still to no avail. Searching the internet, I came across a website called suzukiforum.com and there, this guy was able to help me with my problem. It turned out to be a maintenance switch that kicks on every 50,000 miles. This switch is like a secret that the auto manufactures use to ploy owners of their cars to bring to the dealer and then rack up the dollars in unnecessary "repairs". The switch is located under the dash and can be hidden anywhere. From the assistance of the guy on the forum, he was able to send me photos of this damn switch and possible locations where it may be mounted. I found mine in about 5 minutes, where it was attached to the steering column. It's a tiny switch, that you slide up or down, depending on what position it is in upon finding it. If it's up, then slide it in the down position and visa versa. Once you do this, the check engine light will go off. Make sure you do not have the car running and you can even unhook one of the battery posts, just to make sure you don't hit anything while rooting around under the dash. Good luck!

Posted on Apr 30, 2009

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1 Answer

Check engine light on but runs fine


the light comes on for 4 reasons.
1: SMOG. failing.
2: horrible MPG. (engine is running in limphome mode....... fix it.
3: pending doom. (early warning)
4: the NAG lamp , the old leaded gas, mileage nag light (USE FED only model)
there is no need for any reader ( they dont sell them for trackers, and sidekicks)

all there is , is the paper clip test. the winky-blinky test.

http://www.fixkick.com/CEL/cel-index.html

Nov 25, 2013 | 1991 Geo Tracker

1 Answer

1991 geo tracker need engine block need to buy it do not know where to find it for a good price


google is your friend
search G16 engine rebuilt. short block.

good price means?
to me it means not the dealer. the do have it.....

Feb 04, 2013 | 1991 Geo Tracker

1 Answer

Code 13 on a geo tracker is on and the O2 sensor is not that old


Code 13 is saying the O2 sensor is not responding as expected.
Possible causes are a faulty sensor, but also a faulty thermostat or idle speed higher than normal, among other things.
A mechanic would check engine temp and use a scanner to "read" the O2 sensor data flow.

Jul 07, 2012 | 1993 Geo Tracker

3 Answers

My Geo still doesn't start after resetting check engine light switch!


The check engine light being on indicates a problem in the electronic system that controls the engine, so resetting the CE light without reading the code that was set with the light being turned on by the on board computer has not fixed the problem that is keeping it from starting. This is an early system called OBD1, it requires a special scanner to plug in and read the fault codes you have. .

Feb 19, 2012 | Cars & Trucks

1 Answer

How do I obtain and read the error codes on a 1991 Geo Tracker?


You must use a short jumper wire to ground the white diagnostic connector. This terminal is part of the Assembly Line Diagnostic Link (ALDL), located under the dash near the ECM. This is under the passenger side glove box behind the kick panel.

To activate the diagnostic codes, jump terminals 1 and 3 (the two outer terminals of the white connector). Then turn the ignition switch to on (engine not running). The check engine light will flash a code of 12 three times and then display the stored trouble codes.

To clear the codes, remove the ECM fuse for at least 10 seconds.

Mar 07, 2011 | 1991 Geo Tracker

1 Answer

N dash lights on 91 geo tracker


Check your tail lights to see if they're working also, they used to be on the same fuse in the lighting circuit. Replace a blown fuse.

Oct 19, 2010 | 1991 Geo Tracker

2 Answers

91 Geo tracker , Starting problems


my geo tracker wont turn over the lights wont come on nothing is working iv tested the battrey its fine and checked all the fueses they are fine too why is there no power to any thing?

May 31, 2010 | 1991 Geo Tracker

1 Answer

Jumped time


If it jumped ignition timing then the timing belt needs to be replaced. Does the distributor still turn when you turn over the engine? If not then the timing belt is broke. Hope this helps. Remember surveys, thats what keep us here for you

Dec 23, 2009 | 1991 Geo Tracker

2 Answers

Fuel pump relay


check fuel psi at fuel rail with fuel tester, if u think its a fuel problem.
prob a spark prob. check spark with spark tester.

Sep 07, 2009 | 1991 Geo Tracker

2 Answers

1991 Geo Tracker only starts with starting fluid.


Check fuel filter on both vehicles...After that check fuel pressure ...Blocking off air flow to engine will change the fuel air mixture...air deprivation changes (lessens) air flow and fools engine into reading more fuel than is actually there. Mass air flow sensor should also be checked/cleaned if no results obtained by filter change if pressure is OK.

May 29, 2009 | 1991 Geo Tracker

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