P02F5

Cylinder 8 Injector Circuit Range/Performance

Q: 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.

Q: Can I just clear P02F5?

You can, but it will return until the injector circuit fault is repaired.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P02F5 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX