P02F2
Cylinder 5 Injector Circuit Range/Performance
Fuel injection
Generic OBD-II
High
What it means
P02F2 means the ECM sees the cylinder 5 fuel injector's electrical signal falling outside its expected range — the injector or its circuit isn't responding the way it should. This can make cylinder 5 misfire or run rough, so it's worth tracing to the injector or its wiring before the misfire strains the catalytic converter.
High
Can I keep driving? You can usually drive short-term, but cylinder 5 may misfire and run rough — get it checked before a persistent misfire damages the catalytic converter.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or misfire from cylinder 5
- Hesitation or reduced power under load
- Slightly increased fuel consumption
Common causes
Most likely first
- Faulty cylinder 5 fuel injector (out-of-spec resistance or response)Likely
- Wiring or connector fault on the injector circuit (open, short, or chafed harness)Common
- Poor or corroded connection at the injector or driver moduleCommon
- Failing injector driver in the ECM/injector control moduleLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the fault is on cylinder 5's injector circuit.
- Inspect the injector connector and wiring for damage, corrosion, or a loose pin.
- Measure the injector's resistance and compare it to the other cylinders.
- Swap the suspect injector with a known-good cylinder to see if the fault follows it.
- If wiring and injector check out, test the driver circuit at the control module. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P02F2?+
For short trips, usually — but a mis-delivering injector can cause a misfire, and sustained misfires damage the catalytic converter. Repair it soon.
Can I just clear P02F2?+
It will come back until the injector circuit fault is fixed. Clearing only resets the light temporarily.
Related codes
Often seen with P02F2
Read & clear P02F2 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