P2CA6DC/DC Converter Temperature Sensor E 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
- P2CA6 is logged when the voltage of DC/DC converter temperature sensor E sits below the lower edge of its window. Converter sensors are usually thermistors whose resistance falls as they warm, so a signal that collapses towards zero would mean a converter hotter than physically plausible. A chafed signal wire touching ground or an internally shorted thermistor is the normal explanation; genuine overheating would first produce smooth, believable readings. No manufacturer documents P2CA6 publicly, and published bulletins only go up to sensor D. CARB requires out-of-range detection on hybrid input components. Because the controller has to assume excess heat, it typically cuts converter power at once. The opposite signal fault is P2CA7.
- What you may notice
- MIL and hybrid or charging warning on
- Converter switched off or strongly limited immediately after start
- Low 12 V voltage message on longer drives
- Likely causes
- LikelySignal wire of sensor E chafed through and shorted to ground
- PossibleThermistor of sensor E shorted internally
- RareActual severe overheating of the converter, e.g. coolant loss
- 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.