OBD Codes List

Diagnostic reference · P0A0F

P0A0F

Engine Failed to Start

System
Powertrain control (P code)
Lamp
Check Engine Light
Category
Powertrain - Hybrid Propulsion

What it means

P0A0F means Engine Failed to Start.

Check these first

  • A crank or cam position sensor fault
  • A weak fuel pump or clogged filter
  • An ignition coil or spark plug fault
  • A starter or starter circuit fault
  • A weak 12 volt battery

What to do next

  1. Check the battery voltage and charge as needed
  2. Check for spark and fuel pressure
  3. Scan for crank and cam sensor codes
  4. Check the starter circuit and relay
  5. Repair the failed system found
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.