P0065
Air Assisted Injector Control Range/Performance
The air-assist injector control system (used on some lean-burn or direct-injection engines to atomize fuel with air) shows a performance deviation from the expected behavior.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Air passage clogged with carbonCommon
- Sensor element aged beyond calibration windowLess likely
- Sensor mounting loose - signal dampingLess likely
Parts involved
- Air Assist Valve
- Air Supply
P0065 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.