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Old 03-09-2017, 08:26 AM
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Blinking red light of aggrivation.

Need a little help. 2013 JK 3.6L. I have been having the engine light come on and the red lightning bolt light come on flashing from time to time. It then goes into power save mode and gives me a P2127 code for the throttle position sensor low voltage E. I don't think its the actual module because it is very random. The dealership couldn't find the issue. Sometimes it happens once every couple of weeks, sometimes it will happen quite a bit. I don't think its the ECM, I had a new one put in and flashed when I put my charger on early December. Yesterday it happened twice after I hit a bump at low speed. Happened once pulling into the gas station yesterday, going over a dip that jarred the jeep, cleared it, pulled out over the same dip and it did it again. Had no issues with it yesterday before that. I'm guessing its a bad/loose connection somewhere. My first guess is to start at the throttle body clip and move backward. Any other input, experience, advice is helpful.
Thanks,
Frank

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Old 03-09-2017, 09:11 AM   #2
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I had the same problem with a 2010 Silverado. Final fix was the throttle position sensor. It had ants in it! Go figure? But replaced tpms and no more problems.

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Old 03-09-2017, 03:23 PM
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May be right. I've checked all wiring connections. checked fuses. tapped on the throttle control module , new battery, changed the plugs; figured why not, backed the flash out of the ecm and reflashed it... still nothing. Guess I'll have to leave it up to the dealer, not sure why they didn't change it last time I took it in but whatever. seems to be a fairly common problem from what I've found in research.
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