P2CA8DC/DC Converter Temperature Sensor E 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
- P2CA8 covers sensor E of the DC/DC converter when its voltage is electrically fine but the temperature it reports does not make sense. Typical plausibility tests compare all converter sensors after a long soak, when they should agree, or check whether a reading moves at all while the converter is under heavy load. FCA shows the pattern for lower letters: on the 2021 Ram 1500 eTorque, bulletin 08-037-21 lists performance codes for sensors 1, 2, C and D, turning them into one-trip faults with new hybrid control software, but sensor E is not named. No manufacturer documents P2CA8 publicly. CARB explicitly demands rationality monitoring for hybrid component temperature sensors. Drift, poor thermal contact of the sensor or software are the usual suspects.
- What you may notice
- MIL on, possibly after a single drive
- Converter temperature in live data not following load or ambient
- Likely causes
- PossibleSensor E drifting away from the other converter sensors
- PossibleSensor E has lost thermal contact with the part it measures
- PossibleOutdated converter or hybrid control software with too tight limits
- RareContact resistance in the connector shifting the signal
- 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.