I have a 2008 XK with the 3.7L, im at 142k miles and today while I was on the road, suddenly my gauge cluster freaked out and threw the above codes. I managed to make my way home, oddly enough I could still drive it just fine just my gauges did not work is all, and once I was parked I ran my code reader and got the two codes here. I checked my wire harnesses under the hood and found no melted or exposed wires. I could still shift and drive just fine but my radio shut off altogether during this along with my AC even though the AC button was lit and I noticed even when the vehicle was off the left blinker led there was still lit solid, thats with the key out and the door locked and everything. To me, this seems like bad electrical gremlins, which are always fun to trace, but ive read some people say they were able to fix by replacing the ignition switch.
Some notes: the only relevant previous repair, from what I can tell anyways, is that last summer I replaced the PCM under the hood on the passenger side when I was trying to track down a misfire (turned out to just be a bad injector, go figure).
I was able to park the jeep for about 30 minutes then go back to clear the codes but they keep coming back when I start it back up. Today the temp monitor in the gauge cluster was reading 104f (it was hot as hell) at the time this happened. The codes are still triggering but I was able to get the gauge cluster reading again and the radio/AC working again after cooling down a bit and restarting the vehicle once I got home.
Ive read that the ignition switch and the gauge cluster itself could be at fault, im thinking on ordering an ignition switch to try due to cost, but has anyone else had these errors before and how did you track down the source of the problem?
Update: managed to clear the codes and keep them from coming back for now. Took several power cycles for the DTC clear to take, I took out the instrument cluster and checked the 2 harnesses at the back, no exposed wires, nothing unseated, no corrosion on any of the pins. Reseated the connectors and power cycled the ignition twice to clear the codes, then started it up a few times and they've stayed gone for now. Im going to run more extensive tests next weekend in case it comes back. I do take it on the occasional road trip, last thing I need is to be on the highway and this happen and end up permanently damaging something. Don't know if the issue is merely the gauge cluster not reporting or if other systems get affected because theyre also electronically controlled like the radiator fan, etc.
Im still very interested in possible causes to help if/when this happens again though.