P2C8EDC/DC Converter Temperature Sensor D Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2C8E is logged when the voltage from DC/DC converter temperature sensor D drops under the lower limit of its window. Power electronics mostly use NTC thermistors, where a falling voltage means rising temperature; an implausibly low value therefore reads as a converter far hotter than it can be. The usual culprits are a signal wire touching ground, a crushed harness or a thermistor that has shorted internally, much less often real overheating. No manufacturer documents P2C8E publicly; FCA proves sensor D exists on the 2021 Ram 1500 eTorque but names only P2C8D for it. CARB requires out-of-range checks on hybrid input components. Since the controller has to assume overtemperature, it tends to throttle the converter straight away. P2C8F covers the opposite direction.
- What you may notice
- Hybrid or charging system warning
- Converter derated right away, less electrical power available
- Likely causes
- LikelySensor D signal wire shorted to ground
- PossibleThermistor shorted internally
- RareConverter genuinely overheating because of a cooling fault
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.