Code result
P2E91
Battery Charger B Internal Power Supply Performance
High severity
What it means
The internal low-voltage power supply of battery charger B does not maintain the expected output. Internal regulator drift or overload.
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
Internal regulator drifted
highOne of the most commonly reported causes for this code — check this first.
Internal load increased
mediumA plausible cause — test and verify before replacing parts.
Related help
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