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-   -   Check Engine Light Reset (http://www.jeepforum.com/forum/f9/check-engine-light-reset-1071313/)

ShaneC 07-17-2010 07:38 PM

Check Engine Light Reset
 
I have a 2000 Wranger and my check engine light was came on and Autozone told me I needed to replace my fuel cap. I did but the lights still on. Is there a way to reset the light or is there most likely still a problem?

RubiconBlack 07-17-2010 07:49 PM

AutoZone likes to sell parts! Even if your vehicle doesn't need they tell you. Check out the "2004 jeep liberty running rough help" and see what AutoZone told him. http://www.jeepforum.com/forum/f19/2...-help-1066711/

I'm not saying they where wrong! If the problem is fixed the light will go out on its own after two or three trips. Basically when you drive it long enough for all the computers to say that everything is in working order two or three times.

noise_maker 07-17-2010 07:53 PM

unfortunately on the 2000 due to a wire harness change you may have to have it cleared via odbII reader.

on the 99s and 01s you read and clear the codes using the key but on the 2000s it doesn't always work Before I bought a reader I use to get autozone to clear them for free for me.

I bought one of these a year ago for $12 - you have to watch the auctions though to find it that cheep. even at $30 its still way cheeper then the hand tools and works great

http://cgi.ebay.com/ebaymotors/BLUET...Q5fAccessories

Knuckelhead 07-17-2010 08:02 PM

Quote:

Originally Posted by ShaneC (Post 9805188)
I have a 2000 Wranger and my check engine light was came on and Autozone told me I needed to replace my fuel cap. I did but the lights still on. Is there a way to reset the light or is there most likely still a problem?

Disconnect the battery for 30 seconds and then reconnect it...

GOLENJEEPTJ 07-17-2010 08:56 PM

And if that doesn't work.... you didn't need a fuel cap!

Echos58 03-27-2012 08:00 PM

Does anyone key sequence to turn off engine light on 2001 wrangler

SlackJaw 03-27-2012 08:05 PM

Quote:

Originally Posted by Knuckelhead (Post 9805301)
Disconnect the battery for 30 seconds and then reconnect it...

for real? will it work on '04?

joeyk803c 03-27-2012 08:09 PM

drive it for a few days, if the problem is fixed the code goes away.

angelo2975 03-27-2012 08:10 PM

Only hard codes will come back on after you pull the battery ...soft codes will be wiped clean

DET_99TJ 03-27-2012 08:59 PM

Quote:

Originally Posted by noise_maker (Post 9805259)

on the 99s and 01s you read and clear the codes using the key but on the 2000s it doesn't always work Before I bought a reader I use to get autozone to clear them for free for me.

how do you read and clear codes by key?

jeepinjeffrey 03-27-2012 09:06 PM

I dont think you can clear codes with the key but you can read them http://www.quadratec.com/jeep_knowle...article-39.htm

Knuckelhead 03-27-2012 09:41 PM

Quote:

Originally Posted by SlackJaw (Post 13315033)
for real? will it work on '04?

Yes.
Quote:

Originally Posted by DET_99TJ (Post 13315443)
how do you read and clear codes by key?

You have to use a code reader for 1998-2000. You can't clear the codes using the key to read the codes on the odometer...

SlackJaw 03-27-2012 09:49 PM

Quote:

Originally Posted by DET_99TJ (Post 13315443)
how do you read and clear codes by key?

Quote:

Originally Posted by jeepinjeffrey (Post 13315481)
I dont think you can clear codes with the key but you can read them http://www.quadratec.com/jeep_knowle...article-39.htm

If I may, and I may be not understanding as well.

Are you saying there is a way to use the ignition key to diplay the code on the odometer???

I think your link just showed code definitions.

I would also like to know how to do this, if I'm not entirely misreading your posts.

jeepinjeffrey 03-27-2012 10:20 PM

Yes you can have the coed show up in the little odometer screen and use that chart to decode the codes.

For a 1998 - Present TJ
in 1998, Chrysler upgraded the Jeep's internals to include their revised system used across many Chrysler fuel-injection models. This newer system still provides for reading the codes yourself. But how you do it and actual codes themselves are different from the 1997 and earlier models.

The method you use to view the engine diagnostics is now different. Starting in 1998, the method of repeatedly switching on/off of the ignition is now used for programming the new Chrysler Sentry Key system. The Sentry Key was introduced in 1998 as an optional feature and by 2000 was standard on all TJs. Some 1998 models without the Sentry Key system may still use the older procedure. The way to tell if your Jeep has the Sentry Key system is if the plastic head on your keys are gray--you do. Black headed keys mean you don't have the Sentry Key system.

So on TJs with the newer diagnostic system, to see the codes you put the key into the ignition, push and hold down the odometer reset button, turn the key to RUN, then release the odometer reset button. When you do this you are rewarded with dancing number displays, the firmware version number, any error codes, then a diagnostic test of all the dash indicators and gauges. The gauges will, one by one, go through a calibration--the needles moving and stopping at major increments so you can check their alignment with the dial markings.

Output from the newer onboard diagnostics is easier to read now, as you get full 4-digits codes for much greater detail.

jeepinjeffrey 03-27-2012 10:21 PM

or try this
put key in ignition
turn key "on"
turn key "off"

turn key "on"
turn key "off"

turn key "on"
turn key "off"

Code displays on odometer


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