Powertrain
generic / SAE
P0AFE
Hybrid/EV Battery System Voltage Too Low for Voltage Step Up Conversion
The HV battery system voltage is too low to enable voltage step-up (boost) conversion. DC/DC converter cannot operate.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / FE
Possible causes
- HV battery depleted high
- Battery cells aged medium
- Pack cell imbalance approaching service threshold low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 500–4000 €
- Estimated time: 2–12 h
- Component: hv battery
- Component: dcdc step up converter
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012