OBD-II code · Powertrain (generic)
P0EC4 A/C Refrigerant Temperature Sensor A Circuit Range/Performance
The ECM detects a range/performance fault on the a/c refrigerant temperature sensor a circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0EC4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Refrigerant Temp Sensor A, Wiring Harness
Related codes
- P0EC9A/C Refrigerant Temperature Sensor B Circuit Range/Performance
- P0EC1A/C Compressor Motor Phase W Current Sensor Circuit High
- P0EC2A/C Compressor Motor Phase W Current Sensor Circuit Intermittent/Erratic
- P0EC3A/C Refrigerant Temperature Sensor A Circuit
- P0EC5A/C Refrigerant Temperature Sensor A Circuit Low
- P0EC6A/C Refrigerant Temperature Sensor A Circuit High
- P0EC7A/C Refrigerant Temperature Sensor A Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.