P02F8
Cylinder 11 Injector Circuit Range/Performance
Fuel injector circuit
Generic OBD-II
High
What it means
P02F8 means the fuel-injector control signal for cylinder 11 is outside its expected range — the ECM sees the injector circuit behaving abnormally. On a large engine that uses cylinder 11, this usually shows up as a misfire or dropped cylinder on that bank. The fault is electrical: the injector itself, its wiring, or the driver circuit.
High
Can I keep driving? Driveable in most cases, but cylinder 11 may misfire or drop out — reduced power and rough running until the injector circuit is repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Rough running or misfire on cylinder 11
- Reduced power and hesitation
- Possible increased fuel use or hard starting
Common causes
Most likely first
- Faulty injector on cylinder 11 (open/shorted winding)Likely
- Injector wiring open, shorted, or chafed on that circuitCommon
- Poor or corroded connection at the injector or driver moduleCommon
- Fault in the injector driver / control module outputLess often
How to diagnose & fix
Work through it in order
- Scan and read freeze-frame data to confirm the fault is on cylinder 11's injector circuit.
- Inspect the injector connector and wiring for damage, corrosion, or a poor pin fit.
- Measure the injector's coil resistance and compare it to the other cylinders.
- Check the driver-module supply and ground circuits before condemning the module.
- Replace the injector if it is out of spec; repair wiring or the driver output as found. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P02F8?+
Brief driving is usually possible, but a dropped cylinder means reduced power and raw fuel that can harm the catalytic converter over time. Fix it soon.
Can I just clear P02F8?+
It returns as soon as the ECM re-checks that injector circuit. The electrical fault has to be repaired first.
Related codes
Often seen with P02F8
Read & clear P02F8 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX