Code result
P0E3B
Hybrid/EV Battery Coolant Pump Overspeed
High severity
What it means
The HV battery coolant pump exceeds the calibrated maximum speed. Mechanical load lost or rotor offset.
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
Mechanical load lost
highOne of the most commonly reported causes for this code — check this first.
Air pocket in loop
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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