check engine light wont turn off...
10-09-2017, 09:29 PM
#1
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Join Date: Nov 2015
Location: Calif
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Year: 1994
Model: Cherokee
Engine: 5.2L V8
check engine light wont turn off...
The check engine light recently came on and I checked the code. Told me to change out the O2 sensor, so I did. Check engine light is still on. Checked the code and nothing, just the 12 for beginning and 55 for end. I'm confused! I need to get her regd in Calif by December. Not sure what to do now...
10-09-2017, 11:29 PM
#2
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Location: NJ
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Year: 2004 WJ, 1998 XJ
Model: Grand Cherokee(WJ)
Engine: 4.7 HO
What engine/year?
Clear the code with a code reader or disconnect the negative battery terminal. Realize though you'll have to go through a full drive cycle before you'll pass inspection. At least that is how it works in nj.
Clear the code with a code reader or disconnect the negative battery terminal. Realize though you'll have to go through a full drive cycle before you'll pass inspection. At least that is how it works in nj.
10-09-2017, 11:43 PM
#3
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Location: Calif
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Year: 1994
Model: Cherokee
Engine: 5.2L V8
I have a 94, so cant use the code reader. I have also tried to disconnect the battery cables. First for 45 min...Now trying overnight...
BTW, all my jeep info is under my username...
BTW, all my jeep info is under my username...
10-10-2017, 05:08 AM
#4
Old fart with a wrench
I was going to say....for quite a while we didn't have that. Now we do again, IF people take the time to fill it out! It's a Grand Cherokee though. ZJ.
Touch the 2 cables together to discharge the capacitors in the PCM, wiping out the memory in it. Overnight should do it anyway.
Touch the 2 cables together to discharge the capacitors in the PCM, wiping out the memory in it. Overnight should do it anyway.
10-10-2017, 03:16 PM
#6
Old fart with a wrench
Not all of it. We used to be able to post t/case and tires, etc, but now it's just year, model, and engine. I wish guys would post location because it helps to know what environment it's operating in. I once tried to help a jeeper with a cold starting problem. It finally came out he was in Oahu while I was freezing my nuts off here in Syracuse at -15*. His idea of a cold start was 67*! He had to warm the PCM with a hairdryer to get it started.
Last edited by dave1123; 10-10-2017 at 03:24 PM.
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10-10-2017, 06:57 PM
#8
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Year: 97
Model: Cherokee
Engine: 4.0
Not all of it. We used to be able to post t/case and tires, etc, but now it's just year, model, and engine. I wish guys would post location because it helps to know what environment it's operating in. I once tried to help a jeeper with a cold starting problem. It finally came out he was in Oahu while I was freezing my nuts off here in Syracuse at -15*. His idea of a cold start was 67*! He had to warm the PCM with a hairdryer to get it started.
10-11-2017, 11:16 AM
#9
Old fart with a wrench
I get so frustrated some times trying to beg info out of posters, I sometimes turn the computer off and go to bed! Not really, but sometimes I'm tempted.