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Unread 04-12-2013, 06:29 PM   #1
lib345
Registered User
2007 KJ Liberty 
 
Join Date: Apr 2013
Location: denver, co
Posts: 2
HELP electronic throttle control, electronic stability, warnings, loss of power

This concerns a 2007 Jeep Liberty, well maintained, 65k miles.
3 episodes over 10 days where the vehicle loses most of its power while driving.

I get warning signals on the dashboard (number 26 and number 28. page 166 in the manual). 26 is electronic throttle control warning light; number 28 is electronic stability program for traction control system.

Each time the jeep lost power, would only do about 15 or 20 mph, I pulled over, I turned the engine on and off a few times, and the Jeep would start up and run fine.

The first 2 episodes happened on the same morning, and I drove over to the Chrysler Jeep place and talked to a couple guys in the service department. I described what had happened and they told me they could not do anything to find the cause because the warning lights were not on right now and a diagnostics test would not show anything -- the error codes do not get stored.

I bought an OPD2 reader to use while the warning lights were on. This morning it happened again (3rd time). I pulled over, with the engine running I plugged the thing in and got no codes. I shut the engine off, then keyed to "on", and again could get no codes from the OPD2.

Does anybody have any idea what is going on, and how to fix it?

Many thnx

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Unread 04-12-2013, 06:43 PM   #2
olewilly
Registered User
1989 MJ Comanche 
 
Join Date: Mar 2013
Posts: 68
I'm no pro mechanic, but my 89 MJ was doing the same thing, but I pulled the throttle position sensor and cleaned it (it was almost solid black) and put it back in there and I've had no more trouble out of that aspect. But I'm also not familiar with that new of a model. Just thought I'd give you an idea.
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Unread 04-13-2013, 12:19 PM   #3
lib345
Registered User
2007 KJ Liberty 
 
Join Date: Apr 2013
Location: denver, co
Posts: 2
possible cause?

I've been asking around about this problem, one source says it's a fly by wire failure on the throttle, and it is either the throttle body or pedal sensor.

Does this make sense? How to test it? What kind of cost would be involved?
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Unread 04-13-2013, 06:34 PM   #4
olewilly
Registered User
1989 MJ Comanche 
 
Join Date: Mar 2013
Posts: 68
Makes since but I'd clean that sensor first, it was also the same problem with my buddy's wrangler and my step dads Cherokee.
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