OBD-II code · Powertrain (generic)
P0ECA A/C Refrigerant Temperature Sensor B Circuit Low
The ECM detects a low fault on the a/c refrigerant temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0ECA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
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 B, Wiring Harness
Related codes
- P0EC5A/C Refrigerant Temperature Sensor A Circuit Low
- P0EC7A/C Refrigerant Temperature Sensor A Circuit Intermittent/Erratic
- P0EC8A/C Refrigerant Temperature Sensor B Circuit
- P0EC9A/C Refrigerant Temperature Sensor B Circuit Range/Performance
- P0ECBA/C Refrigerant Temperature Sensor B Circuit High
- P0ECCA/C Refrigerant Temperature Sensor B Circuit Intermittent/Erratic
- P0ECDA/C Refrigerant Distribution Valve A Control Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.