I have a 2004 coupe that now has a TPMS light on that won't stay off. After replacement of the tires in the past, or correcting low tire pressure, the dash light has always gone out. Now when the car is started, the TPMS light comes on as its supposed to, goes out for a few seconds (2-3) but then comes back on solid. The car had its RCM replaced immediately before this issue started. In fact, the light was on when I drove it home. At the time I believed it to be just low tire pressure like it had in the past 11 years of ownership.

The tires all have the Schrader EZ-sensor #33500 installed in them and the tire shop says the sensors are working fine. I took it to a Chrysler dealership in the California central valley who agreed to reset the system but they were unable to. They checked the tire pressures, sensors, and the receiver and said all were working fine but there were error codes that might be keeping it from working. Specifically they found:

P2300 - IC CAN communication is faulty
P2315 - IC CAN message incorrect
P2316 - IC automatic temp control CAN message missing
P2404 - ABS message
P2312 - EngCan message missing

At that point they said they needed more time to resolve. As I hadn't planned to be there all day and the agreed cost was really going to be exceeded with no guarantee of success I left. For the record, the dealership didn't charge me anything as they said they didn't do what I came in for. I immediately talked to my regular mechanic who said he hadn't heard of such a thing before, but he'd need a few hours as well unless I could point him in the right direction.

Has anybody had this experience before?