OBD Codes List

Diagnostic reference · P0065

P0065

Air Assisted Injector Control Range/Performance

System
Fuel and air metering (P code)
Lamp
Check Engine Light
Category
Powertrain - Fuel/Air Metering

What it means

P0065 means Air Assisted Injector Control Range/Performance.

Where it lives

For P0065, the part to look at first is the injector named here.

Check these first

  • A restricted or clogged air passage feeding the air assisted injector
  • A weak or dirty air assisted injector
  • Low fuel pressure reaching the air assisted injector
  • A clogged fuel filter lowering supply pressure
  • Wiring or a connector fault on the air assisted injector control circuit

What to do next

  1. Check fuel pressure and flow at the air assisted injector
  2. Inspect the air supply passage to the injector for blockage
  3. Test the air assisted injector control circuit for opens or shorts
  4. Clean or replace the air assisted injector if it is restricted
  5. Replace the fuel filter if flow is low
  6. Clear the code and retest

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Updated

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