Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Before replacing any parts, did you do any diagnostic work or just replace the IAC and TPS trying to fix the P0508 code?
If you have not done any disgnostic's I would start by checking the wiring from the IAC to the PCM.. I attached the wiring diagram to help.. The code you have is:
P0508-IDLE AIR CONTROL VALVE SENSE CIRCUIT LOW
Check the wiring from ther IAC to the PCM and if it ohms around ,001 the wiring is fine and if that's not a OEM IAC I would try a OEM sensor and if the code still comes back then replace the PCM..
I hope this helps,
The PCM senses a short to ground or battery voltage on any of the Linear Idle Air Control (LIAC) control circuits for 2.75 seconds while the IAC motor is active. Two Trip Fault. Three good trips to turn off the MIL.