Code result
P0AFF
System Voltage Too Low for Voltage Step Down Conversion
High severity
What it means
The system input voltage is too low to enable voltage step-down (buck) conversion to 12V. 12V system support compromised.
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
Input voltage below conversion threshold
highOne of the most commonly reported causes for this code — check this first.
Converter input stage fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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