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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Hybrid control module
- Engine starter
- Hv battery
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Weak 12V auxiliary battery
- Starter or ignition system fault
- HV battery state of charge insufficient
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.