OBD-II code · Powertrain (generic)
P0A0F Hybrid Engine Failed to Start
The hybrid control system commanded an internal combustion engine start that did not complete within the expected time. Causes range from low 12V supply to fuel, ignition or starter issues.
Is it safe to drive with P0A0F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWeak 12V auxiliary battery
- PossibleStarter or ignition system fault
- Less likelyHV battery state of charge insufficient
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- Parts involved
- Hybrid Control Module, Engine Starter, Hv Battery
Related codes
- P0A1FBattery Energy Control Module
- P0A7FHybrid Battery Pack Deterioration
- P0A80Replace Hybrid Battery Pack
- P0A0CHigh Voltage System Interlock Circuit Low
- P0A0DHigh Voltage System Interlock Circuit High
- P0A0EHigh Voltage System Interlock Circuit A Intermittent
- P0A10Hybrid Battery Voltage Sense Circuit
- P0A11DC/DC Converter Enable Circuit/Open
- P0A12DC/DC Converter Communication
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.