P02F5
Cylinder 8 Injector Circuit Range/Performance
Fuel injector circuit
Generic OBD-II
High
What it means
P02F5 means the engine computer sees the electrical behavior of the cylinder 8 fuel injector circuit outside its expected range. It usually points to a wiring/connector problem or a failing injector on that cylinder, which can make cylinder 8 misfire and the engine run rough.
High
Can I keep driving? Usually drivable, but cylinder 8 may misfire and run rough — extended driving with an active miss can damage the catalytic converter, so repair it promptly.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle or a miss on cylinder 8
- Reduced power or hesitation on acceleration
- Slightly higher fuel consumption
Common causes
Most likely first
- Damaged wiring or a corroded/loose connector at the cylinder 8 injectorLikely
- Faulty cylinder 8 fuel injectorCommon
- Open or shorted injector control (driver) circuitCommon
- Poor ground or supply to the injector control module / ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and inspect the cylinder 8 injector connector and wiring for damage, corrosion, or a loose pin.
- Measure the injector's resistance and compare against the other injectors; replace it if out of spec.
- Check the injector driver circuit for opens/shorts back to the ECM or injector control module.
- Verify power and ground to the injector control module, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P02F5?+
Short trips are usually fine, but if cylinder 8 is missing you should fix it soon — a sustained misfire can overheat and damage the catalytic converter.
Can I just clear P02F5?+
You can, but it will return until the injector circuit fault is repaired.
Related codes
Often seen with P02F5
Read & clear P02F5 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