check engine light with no codes - JeepForum.com

 
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post #1 of 9 Old 08-05-2012, 04:26 PM Thread Starter
98TJKonaCruiser
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check engine light with no codes

hello, looking for some help/advice. i have a 97.5(98) TJ and I tried the key check maneuver to find the error code for my CEL being on and no code appears. i only see the mileage on jeep, and no lights flash on and off.
am i doing something wrong? i turned the key position on>off>on>off>on, and then waited up to 5 mins. i don't know if i need to wait longer or do anything else. please help.
also, what is good to remove corrosion build up on battery terminals?

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post #2 of 9 Old 08-05-2012, 04:49 PM
asim04LJ
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Did you do the key maneuver in less than 10 seconds?
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post #3 of 9 Old 08-05-2012, 04:51 PM
Knuckelhead
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Quote:
Originally Posted by 98TJKonaCruiser View Post
hello, looking for some help/advice. i have a 97.5(98) TJ and I tried the key check maneuver to find the error code for my CEL being on and no code appears. i only see the mileage on jeep, and no lights flash on and off.
am i doing something wrong? i turned the key position on>off>on>off>on, and then waited up to 5 mins. i don't know if i need to wait longer or do anything else. please help.
also, what is good to remove corrosion build up on battery terminals?
1998-2000 TJ's don't have that function.

Take it to a automotive parts store and have the code read for free, or buy your own code reader.

A wire brush works well for cleaning the battery terminal clamps/posts...
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post #4 of 9 Old 08-05-2012, 05:42 PM Thread Starter
98TJKonaCruiser
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i did what was listed on this page.

http://myjeeptj.com/2008/04/20/1998-...agnostic-codes
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post #5 of 9 Old 08-05-2012, 07:25 PM
mukluk
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Quote:
Originally Posted by 98TJKonaCruiser View Post
i did what was listed on this page.

http://myjeeptj.com/2008/04/20/1998-...agnostic-codes
As already pointed out by Knuckelhead, the on/off key trick does not work on 1998-2000 Wranglers. You are going to have to use a code reader to find out why you have a check engine light.
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post #6 of 9 Old 08-05-2012, 09:39 PM
GilaMtnJeep
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What he said^^^^

Silence is Golden, Duct tape comes in Many Colors.

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Work with enthusiasm as though you were working for the Lord rather than for man.

http://www.treadlightly.org/

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post #7 of 9 Old 08-06-2012, 02:32 AM Thread Starter
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will do. thanks to all.
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post #8 of 9 Old 08-06-2012, 04:59 AM
boondaba
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Quote:
Originally Posted by mukluk View Post
As already pointed out by Knuckelhead, the on/off key trick does not work on 1998-2000 Wranglers. You are going to have to use a code reader to find out why you have a check engine light.
At first I thought you were being immature by calling him a "Knuckelhead"
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post #9 of 9 Old 08-10-2012, 07:21 AM
CJ Chet
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On that battery, use baking soda (good old Arm and Hammer) and water. Works like a champ!

'86 CJ7
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