KlaroFault codeP0065
MODERATEAir Assisted Injector Control Range/Performance
What this code means
Air Assisted Injector Control Range/Performance.
P0065 is a generic code: it means the same thing on every make. P0065 belongs to family P00xx — Fuel and air metering, auxiliary emission controls. Its page explains how to read a code and groups all its codes by part.
Type of fault
The signal stays within its electrical limits, but its value is not plausible: it does not match what the control unit expects given the other sensors. The sensor may be drifting with age, but it may also be faithfully measuring a real mechanical problem — a leak, a blockage, an air leak. Replacing the sensor without checking does not always clear the fault.
Air-assisted injector system
On a few engines, a little air is blown into the injectors to atomise fuel more finely, especially at idle and on cold starts. A valve controlled by the control unit lets that air through.
What you notice
Rough idle or hesitation on cold starts are the most common signs; often nothing at all once warm.
How to check it
Look for a disconnected or split air hose between the intake and the injectors, then check the control valve's connector and its resistance with a multimeter.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →
How to read this code
- PPowertrain
- 0standardised code
- 0Fuel and air metering, auxiliary emission controls
- 65P0065
