OBD-II code · Powertrain (generic, extended)
P2D2B Hybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation
The signals of the HV battery pack coolant temperature sensors A and B do not correlate within the calibrated tolerance. One sensor drifts or installation offset between channels.
Is it safe to drive with P2D2B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor characteristic drifted
- PossibleHarness incorrectly swapped between channels
- Less likelyPack cell imbalance approaching service threshold
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
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Hybrid Battery Coolant Temp Sensor A, Hybrid Battery Coolant Temp Sensor B, Bms
Related codes
- P2D28Cold Start Propulsion Torque Performance
- P2D29A/C Compressor Motor Stalled
- P2D2AHybrid/EV Electronics Coolant Temperature Sensor A/B Correlation
- P2D2CEngine Coolant Temperature Measurement System - Multiple Sensor Correlation
- P2D2DCold Start Intake Manifold Runner Performance Bank 1
- P2D2ECold Start Intake Manifold Runner Performance Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.