P2CABDC/DC Converter Temperature Sensor F Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2CAB is set when DC/DC converter temperature sensor F delivers a voltage above the top of its valid band. For a thermistor input this is the typical signature of an open circuit, since the pull-up drags the line to reference voltage, or of a short to a higher voltage. The resulting value would be colder than the surroundings, which a working converter can never be. No manufacturer documents P2CAB publicly; bulletins name converter sensors only up to letter D. CARB requires range monitoring of hybrid input components. Checking the connector at the converter, its locking and the terminals for spread or corrosion comes first, as the sensor is frequently built into the converter assembly. P2CAA is the low counterpart, P2CA7 the same fault for sensor E.
- What you may notice
- MIL and hybrid system warning on
- Converter temperature shown far below ambient
- Reduced 12 V supply from the converter
- Likely causes
- LikelyConverter connector not latched or terminals spread
- PossibleBroken signal or return wire of sensor F
- RareSignal line shorted to a higher voltage
- 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: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.