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Go Back > Models > Jeep Cherokee & Comanche Forums > MJ Comanche Technical Forum > check engine light

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Unread 04-19-2008, 04:30 PM   #1
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Join Date: Apr 2008
Location: ohio
Posts: 1
check engine light

hey guys was wondering if anybody knew what pins to jump to get the code for the check engine light on an 88 comanche

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Unread 04-19-2008, 04:54 PM   #2
Pete M
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1988 MJ Comanche 
Join Date: Sep 2005
Location: S/E Michigan
Posts: 1,837
There are no codes. The E-light on the early MJs is on a mechanical timer set to go off after about 80k miles. It does not mean that there is anything wrong with the truck. The timer is a small clear box under the dash. Just unplug it and forget about it. Unless you live in a state that requires you to maintain it, then you need to get a new one at the dealership.
Jeep on!
-88 MJ; 4.0L, ex-2wd, TJ ax15/231, 78 Ford D44 w/spool, 9" w/posi, 33" trXus MTs, custom roll-bar/bumpers/etc.
Also an 86 MJ Metric ton and 2 '90 MJs
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