P2C8DDC/DC Converter Temperature Sensor D Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2C8D is the plausibility test of DC/DC converter temperature sensor D: the voltage is electrically valid, but the temperature it implies does not match what the controller expects. Typical cross-checks compare the sensor with its neighbours after a long rest or look for a value that hardly changes while the converter works hard. FCA applies the code to its eTorque Ram 1500 pickup of model year 2021 (3.6 L V6), next to P0C39, P0C3E and P0E59 for the other converter sensors. Bulletin 08-037-21 flashes new Hybrid Control Processor software for trucks built up to 5 January 2021, and with it P2C8D becomes a one-trip fault, so the MIL lights after the first failed drive. FCA does not publish its limits. CARB demands rationality checks for hybrid component temperature sensors.
- What you may notice
- MIL on, with newer FCA software after one faulty drive
- Reduced eTorque assist or start-stop availability
- Likely causes
- PossibleHybrid control software level (FCA HCP update per 08-037-21)
- PossibleSensor D drifting and disagreeing with the other converter sensors
- RareUneven cooling of the converter, e.g. low coolant or air in the circuit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.