P0EC2A/C Refrigerant Temperature Sensor B Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- With P0EC2 the signal of refrigerant temperature sensor B is stuck near the reference voltage. An NTC thermistor would only get there at extreme cold, so an open circuit somewhere in the loop is far more likely. No manufacturer documents P0EC2 publicly. Mitsubishi's procedure for the analogous evaporator outlet sensor of the Outlander PHEV shows the logic: the A/C amplifier sets its open-circuit code after 4 seconds of high input while READY is on or the battery is charging, and the technician measures about 5 V at the unplugged connector and checks both lines for continuity under 2 ohms. A false cold reading may lock out heating or cooling. Low counterpart: P0EC3.
- What you may notice
- Very low refrigerant temperature shown for sensor B
- Heating via heat pump or cooling unavailable
- Likely causes
- LikelyOpen signal or ground line between sensor B and module
- PossibleConnector not fully seated after A/C work
- PossibleSensor B open internally
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.