P02F3
Cylinder 6 Injector Circuit Range/Performance
Fuel injector circuit
Generic OBD-II
High
What it means
P02F3 means the engine computer sees the electrical signal to the cylinder 6 fuel injector as out of its expected range — the injector isn't responding the way it should. That usually leaves cylinder 6 under- or over-fueled, so the engine can run rough and misfire on that cylinder until the injector or its wiring is repaired.
High
Can I keep driving? You can usually drive short distances, but cylinder 6 is likely mis-fueling and misfiring — keep trips short until it's fixed to protect the catalytic converter.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or a noticeable miss from one cylinder
- Hesitation or reduced power under load
- Slightly increased fuel use or a fuel smell
Common causes
Most likely first
- Faulty cylinder 6 fuel injector (open, shorted, or out of spec)Likely
- Damaged, chafed, or corroded injector wiringCommon
- Poor connection at the injector or injector-driver connectorCommon
- Fault in the injector driver / control module circuitLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the code is specific to cylinder 6.
- Inspect the cylinder 6 injector connector and wiring for damage, corrosion, or a loose pin.
- Measure the injector's resistance and compare it against the other injectors.
- Swap the suspect injector with a known-good cylinder to see if the fault follows it.
- Replace the injector or repair the circuit, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P02F3?+
Briefly, yes, but a mis-fueling cylinder can misfire and send raw fuel into the exhaust, which overheats the catalytic converter. Get it repaired soon.
Can I just clear P02F3?+
It will come back within a few drive cycles unless the injector or its circuit is actually repaired.
Related codes
Often seen with P02F3
Read & clear P02F3 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