Re: Oil Change Sensor Gone Bad?
I don't think there is a senor. A real sensor of that type would cost as much as the vehicle according to John Martin in a TDR magazine article a while back. He is a retired oil industry engineer and at one time task with that very issue - building such a sensor. They do exist but usually only measure one of many parameters such a electrical impedance. I believe the jeep uses a duty cycle algorithm to base oil change interval. In other words, the harder you drive it the shorter the interval. I'd ignore it and use mileage. If you worried do used oil anaylsis. Everyone in the auto industry will tell you to change your oil sooner than necessary. Think about it, it makes them money and leaves no chance of excessive wear. Doing oil analysis gives you accurate objective data for your vehicle and situation.
HERS:'06 Liberty CRD - EHM with Provent, GDE eco, Brite Box, Stanadyne FM100, Cummins lift pump, XM/Sony sound, OME lift with 245/75/16s
HIS: '06 Dodge/Cummins - Play truck; a couple of fans, a proper cam shaft, and man handled electrons by EFILive
'01 Dodge/Cummins - Work truck; Lots of mods