Code result
P0AFE
Hybrid/EV Battery System Voltage Too Low for Voltage Step Up Conversion
High severity
What it means
The HV battery system voltage is too low to enable voltage step-up (boost) conversion. DC/DC converter cannot operate.
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
HV battery depleted
highOne of the most commonly reported causes for this code — check this first.
Battery cells aged
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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