Code result
P2D2B
Hybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
One sensor characteristic drifted
highOne of the most commonly reported causes for this code — check this first.
Harness incorrectly swapped between channels
mediumA plausible cause — test and verify before replacing parts.
Pack cell imbalance approaching service threshold
lowLess common, but worth ruling out after the more likely causes.
Related help
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