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.
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.
Common causes
- high
One sensor characteristic drifted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-390
- medium
Harness incorrectly swapped between channels
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-390
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2D2B mean?
P2D2B means "Hybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2D2B?
one sensor characteristic drifted; harness incorrectly swapped between channels; pack cell imbalance approaching service threshold — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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