P02F9
Cylinder 12 Injector Circuit Range/Performance
The cylinder 12 injector drive circuit is electrically OK but the response (current ramp, dwell time, or peak voltage) does not match the calibrated profile — typically a high-resistance solenoid winding or wiring corrosion.
The cylinder 12 injector drive circuit is electrically OK but the response (current ramp, dwell time, or peak voltage) does not match the calibrated profile — typically a high-resistance solenoid winding or wiring corrosion.
Common causes
- high
Solenoid winding ageing
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1650
- low
Sensor element aged beyond calibration window
Less common, but worth ruling out after the more likely causes.
Typical part cost: $220-1650
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P02F9 mean?
P02F9 means "Cylinder 12 Injector Circuit Range/Performance". It is a generic OBD-II code that points to a fault in the fuel & air metering (injector circuit).
What are the most common causes of P02F9?
solenoid winding ageing; sensor element aged beyond calibration window; sensor mounting loose - signal damping — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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