P2CAADC/DC Converter Temperature Sensor F 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
- P2CAA reports that the input for DC/DC converter temperature sensor F reads too low. With the usual thermistor circuit this corresponds to an impossibly hot reading, so the controller suspects the signal path before the hardware: a ground short in the harness, moisture in the connector or a thermistor that failed short. A useful check is whether the value stays low with the vehicle cold and the converter idle, since a real temperature would have dropped long ago. No manufacturer documents P2CAA publicly, and the lettered converter sensors named in bulletins end at D. CARB requires hybrid input components to be monitored for out-of-range signals. The converter is normally throttled or shut off. Siblings: P2CAB (high), and P2CA6 for sensor E.
- What you may notice
- MIL and hybrid or charging warning on
- Very high converter temperature shown even with a cold vehicle
- Converter limited or switched off
- Likely causes
- LikelySensor F signal shorted to ground in the harness
- PossibleMoisture or contamination in the converter connector
- PossibleThermistor of sensor F failed short
- 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.