OBD-II code · Powertrain (generic, extended)
P2D56 Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit Intermittent/Erratic
The ECM detects a circuit intermittent/erratic fault on the hybrid/ev battery pack coolant temperature sensor c circuit. Reading cannot be used reliably for control.
Is it safe to drive with P2D56?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor connector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Battery Pack Coolant Temp Sensor C, Wiring Harness, Bms
Related codes
- P2E78Hybrid/EV Battery Pack Coolant Temperature Sensor D Circuit Intermittent/Erratic
- P2D53Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit Range/Performance
- P2D54Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit Low
- P2D55Hybrid/EV Battery Pack Coolant Temperature Sensor C Circuit High
- P2D57Generator B Control Circuit Range/Performance
- P2D58Generator B Mechanical Performance
- P2D59Generator B Over Temperature
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.