P02B5

Cylinder 7 - Injector Leaking

Q: Is it safe to drive with P02B5?

Briefly — but a leaking injector washes oil off the cylinder walls and can foul the plug and overheat the converter. Repair it soon.

Q: Can I just clear P02B5?

It returns while the injector keeps leaking. The injector has to be tested and replaced for the code to stay off.

Fuel injection Generic OBD-II High

What it means

P02B5 means the ECM has detected that cylinder 7's fuel injector is leaking — passing fuel when it should be closed. The extra fuel makes that cylinder run rich, so the engine idles rough, can be hard to start when warm, and may smell of fuel or show black smoke. It's a fuel-delivery fault on one injector, not a whole-engine no-start.

High

Can I keep driving? Usually drivable but rough — a leaking injector floods cylinder 7, causing hard starts and a rough idle. Fix it before it fouls the plug or damages the converter.

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, especially when hot
Hard starting
Fuel smell or black smoke and reduced economy

Common causes

Most likely first

Leaking or stuck-open injector on cylinder 7Likely
Worn injector seal or O-ring letting fuel weepCommon
Debris on the injector seat holding it openCommon
High fuel pressure worsening the leakLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check cylinder 7 fuel trims for a rich bias.
Inspect the cylinder 7 injector for dripping or a fouled/wet plug.
Perform an injector leak-down or flow test and compare with the other injectors.
Replace the leaking injector (and its seals); clear the code and re-test.
Confirm fuel pressure is within spec so a new injector isn't overwhelmed.

FAQ

Quick answers

Is it safe to drive with P02B5?+

Briefly — but a leaking injector washes oil off the cylinder walls and can foul the plug and overheat the converter. Repair it soon.

Can I just clear P02B5?+

It returns while the injector keeps leaking. The injector has to be tested and replaced for the code to stay off.

Read & clear P02B5 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