Check Engine Light Question - JeepForum.com

 
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post #1 of 13 Old 08-06-2011, 09:31 PM Thread Starter
95YJ_Erwin
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Check Engine Light Question

New to forum so take it easy on me

Drove home my recently purchased 95 YJ 2.5L tonight and check engine light came on and stayed on. I was only a mile from house so drove it rest of way. Gauges were all in good range. Got on forum and found how to check PCM codes. Only got 12 (Direct battery input to PCM was disconnected within the last 50 key-on cycles) and then 55 (end of codes). Did not think a 12 would cause check engine light to stay on. I checked fluid levels and they were fine. Started Jeep back up after about 30 minutes and check engine light did not stay on.

Anyone know if the 12 code can make light stay on or maybe I am missing something? Don't want to to do something stupid everyone else knows about.

Thanks in advance

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post #2 of 13 Old 08-06-2011, 10:11 PM
phil1330
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Sorry I can't help... from another sc jeeper welcome to Jeep Forum.

"Life is hard, it's harder if your're stupid"...The Duke
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post #3 of 13 Old 08-08-2011, 01:56 PM Thread Starter
95YJ_Erwin
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No one seen this?

I take it that no one has seen this before? If ever I figure it out, will post
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post #4 of 13 Old 08-08-2011, 02:26 PM
Buddha
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If I remember correctly I get the 12 and 55 codes every time. If you don't get anything in between then there are no codes.

I have read hundreds, if not thousands, of threads on here and it's amazing the percentage of problems that wind up being caused by something the owner has accidentally done to the Jeep while working on it.

Moral to the story: If you moved it, unscrewed it, unbolted it, hammered on it, wiped it off, re-wired or replaced it - Check there first!
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post #5 of 13 Old 08-09-2011, 01:21 PM Thread Starter
95YJ_Erwin
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Fluke?

So you think it was a fluke that the Check Engine light stayed on this time? Has not come on since then and have put about 70 miles on since then.
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post #6 of 13 Old 08-09-2011, 01:32 PM
Buddha
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Hard to say - but if there's anything I've learned in my six months as the owner of a 93 model Jeep it's to enjoy the time when it appears as though everything is running well. I guess the bottom line is that if there are no codes then the Jeep at least thinks it's okay.

I've heard of the CEL coming on from something as simple as the gas cap not being on tight so there's no telling what it is unless it throws another code. My advice would be to stop worrying about it until it happens again. Sorry I can't be more help.

I have read hundreds, if not thousands, of threads on here and it's amazing the percentage of problems that wind up being caused by something the owner has accidentally done to the Jeep while working on it.

Moral to the story: If you moved it, unscrewed it, unbolted it, hammered on it, wiped it off, re-wired or replaced it - Check there first!
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post #7 of 13 Old 08-10-2011, 06:54 AM Thread Starter
95YJ_Erwin
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Good Advice

Agreed - Life too short
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post #8 of 13 Old 08-10-2011, 09:39 AM
Que89YJ
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If it came on and it was a real issue the code would have stored and you would have been able to retreive it when you check. There are too many potential things that could light the light, but if it was serious it would store the code. You should be fine. If it ever lights again check it when it happens.
Welcome to the forum!
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post #9 of 13 Old 08-12-2011, 09:27 AM Thread Starter
95YJ_Erwin
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So, it finally did it again and I pulled over and went through the codes. This time I also got a 54 - "Distributor sync pickup" code. After sitting there for about 10 minutes (made a call to get directions), started it up and no check engine light anymore. I have checked the plug wires and everything feels tight. Should I replace cap/rotor or does this indicate something else?
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post #10 of 13 Old 08-12-2011, 09:30 AM
oldtime_ironman
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Quote:
Originally Posted by 95YJ_Erwin View Post
So, it finally did it again and I pulled over and went through the codes. This time I also got a 54 - "Distributor sync pickup" code. After sitting there for about 10 minutes (made a call to get directions), started it up and no check engine light anymore. I have checked the plug wires and everything feels tight. Should I replace cap/rotor or does this indicate something else?
"Distributor sync pickup" would be the cam position sensor. It's located inside the distributor body under the rotor, held in with a spring pin. Far as I know anyway.
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post #11 of 13 Old 08-12-2011, 09:49 AM
jbolty
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Chances are the seller cleared the codes. As mentioned, it will come back if there is an issue.

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post #12 of 13 Old 08-12-2011, 10:24 AM
Que89YJ
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Remove the distibutor cap and rotor. Using electrical cleaner spray the sensor in the distributor. If it still keeps showing up then you can get a new sensor for $50 and replace it or get a whole new distributor with the sensor in it for $30 or so dollars more which is what I recommend.
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post #13 of 13 Old 08-13-2011, 11:55 AM Thread Starter
95YJ_Erwin
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Always Something :-)

Thanks all - will try the spray and then replace if still keeps showing up.
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