Mcgusto82 Posted June 2, 2021 Report Share Posted June 2, 2021 2012 DJ 3.6 AWD my DJ has codes P2181, and the lighting bolt light on, while temp readout drops intermittently to 0. no overheating, no rough drive. has new thermostat, new coolant temp sensor, New throttle control car runs with fan on and drops 1 gear lower while lighting bolt is on, Quote Link to comment Share on other sites More sharing options...
Mcgusto82 Posted June 2, 2021 Author Report Share Posted June 2, 2021 Any ideas anyone? Quote Link to comment Share on other sites More sharing options...
5rebel9 Posted June 2, 2021 Report Share Posted June 2, 2021 Intermittent loss would point to wiring problem at coolant temp sensor. Did this just start or has it been happening for some time? Are you sure that the coolant is full and no air entrapment that these motors are know to do when service work on it is done? 2late4u 1 Quote Link to comment Share on other sites More sharing options...
Mcgusto82 Posted June 3, 2021 Author Report Share Posted June 3, 2021 Intermittent in the way that it just drops. last year I replaced the thermostat for cabin heating issues, I bled then, and re bled it last night. 89k miles UPDATE - monitored the coolant temp while driving it. Most of the time, if I restarted the engine, coolant temp would read “accurately “ until it starting reading 110-115, then eventually the gauge drops, this was after about 2 hours Highway driving. i ran the heat all the way up, seemed very hot. For a second I starting thinking stuck open thermostat. Going to look at the plug next. Quote Link to comment Share on other sites More sharing options...
dc1808 Posted August 28 Report Share Posted August 28 I have this exact same problem with my 2008. Lightning bolt comes on and coolant temp gauge reads zero (both happen at the same time). Happens for me about 10 minutes into driving from cold start (ie, when the temp gauge approaches 'normal' operating temp). I think I noticed a rough idle when it happened this morning. Did you ever solve the problem? Thx Quote Link to comment Share on other sites More sharing options...
John/Horace Posted August 29 Report Share Posted August 29 Not likely to answer a three year old thread. Which engine, milage on car, any recent work done on vehicle. Scanning for codes is always a good starting point, auto parts store often do it for free. The 2.4 engine has a common issue at higher milage with the electronic throttle control. Internal plastic gears start to stick…lightning bolt symbol comes up. Car often goes to limp mode, restarting clears temporarily. Codes are stored. Quote Link to comment Share on other sites More sharing options...
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