Code result
P0C77
Hybrid/EV Battery System Precharge Time Too Short
High severity
What it means
The HV battery system precharge time is shorter than the calibrated window. Indicates short circuit or low resistance path.
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
Short on DC-link
highOne of the most commonly reported causes for this code — check this first.
Charge resistor shorted
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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