OBD-II code · Powertrain (generic)
P0CD9 Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Intermittent/Erratic
The ECM detects a intermittent/erratic fault on the hybrid/ev battery pack coolant temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0CD9?
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
- Easy
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Coolant Temp Sensor B, Wiring Harness, Bms
Related codes
- P0C46Hybrid/EV Battery Pack Coolant Temperature Sensor A Circuit Intermittent/Erratic
- P0CD6Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Range/Performance
- P0CD7Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit Low
- P0CD8Hybrid/EV Battery Pack Coolant Temperature Sensor B Circuit High
- P0CDADrive Motor A Position Sensor Circuit C Circuit
- P0CDBDrive Motor A Position Sensor Circuit C Range/Performance
- P0CDCDrive Motor A Position Sensor Circuit C Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.