P02F6
Cylinder 9 Injector Circuit Range/Performance
Fuel injectors
Generic OBD-II
High
What it means
P02F6 means the injector control signal for cylinder 9 is outside the expected range, so that cylinder isn't being fuelled correctly. It typically causes a misfire, rough running, and lost power on one cylinder rather than a full no-start, and it usually traces to the injector, its wiring, or the injector driver circuit.
High
Can I keep driving? The engine will usually run but may misfire, lack power, or run rough on cylinder 9; drive gently and repair soon to avoid unburnt-fuel and converter damage.
Common symptoms
What you'll notice
- Check-engine light on
- Misfire or rough running, especially on cylinder 9
- Reduced power or hesitation
- Possible increased fuel use or exhaust smoke (diesel)
Common causes
Most likely first
- Faulty cylinder 9 fuel injectorLikely
- Open, shorted, or corroded injector wiring or connectorCommon
- Poor connection or fault at the injector driver / control module (FICM on diesels)Common
- Failed engine control module (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the code points to cylinder 9's injector circuit.
- Inspect the cylinder 9 injector connector and wiring for damage, corrosion, or loose pins.
- Measure injector resistance and the driver/control-module supply and ground circuits against spec.
- Replace the injector if it's out of spec, or repair the wiring/connector. On diesels, verify the injector control module before condemning parts. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P02F6?+
Briefly, yes, but a misfiring cylinder wastes fuel and can overheat the catalytic converter. Fix it soon.
Can I just clear P02F6?+
You can, but it returns until the injector or its circuit is repaired.
Related codes
Often seen with P02F6
Read & clear P02F6 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