Code result
P2D38
Hybrid/EV Battery Pack Heater Performance
High severity
What it means
The HV battery pack heater does not raise battery temperature within the calibrated time window. Heater element aged or supply current insufficient.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Heater element aged - low output
highOne of the most commonly reported causes for this code — check this first.
Supply current insufficient
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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