P0067: Air Assisted Injector Control Circuit High — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Air Assisted Injector Control Circuit High. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Powertrain
Symptoms
- Check Engine light
- Hard starting or stalling
- Rough running or hesitation
- Reduced power or abnormal fuel use
Possible causes
- Open, shorted, corroded, or loose wiring
- Faulty injector, regulator, solenoid, sensor, or pump
- Incorrect fuel pressure or restricted supply
- Control-module driver or calibration fault
What to check
- Record codes and freeze-frame conditions
- Follow fuel-system safety procedures
- Verify power, ground, signal, and circuit integrity
- Perform pressure or functional tests where applicable
- Confirm the repair under the original code-setting conditions
- Inspect connectors, fuses, grounds, and harness routing
- Compare commanded and measured pressure or injector operation
- Test the named circuit and component
Also written as: P0067-00, P006700, PO067 (some scan tools add the fault-type byte, e.g. -00).