P0E5CDC/DC Converter Temperature Sensor C Circuit Intermittent/Erratic
- 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
- P0E5C flags a sensor C signal that changes faster than the part it watches could heat or cool. A converter inductor or heat sink has thermal mass, so a jump of many degrees within a few milliseconds points to a contact problem in the circuit, not to the converter itself. No manufacturer documents P0E5C publicly. The sensor is known from Ford, where sensor C watches the boost converter inductor and is checked only through P0E59 with fixed voltage and temperature limits; an erratic check is not described there. CARB requires hybrid input components to be monitored for circuit faults. Typical causes are a loose terminal, vibration damage or moisture at the converter connector. The fault may come and go between drives, so a wiggle test with live data helps more than a static measurement.
- What you may notice
- Hybrid warning that comes and goes
- Short episodes of reduced electric power
- Likely causes
- LikelyLoose or widened terminal at the sensor or converter connector
- PossibleMoisture or corrosion in the connector
- RareChafed wire with intermittent contact
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.