What are the common causes of P02B5?

A leaking injector on cylinder 7. A failed injector 7 O-ring or seal. A short in the cylinder 7 injector circuit. A cracked fuel rail near cylinder 7. A stuck-open injector driver in the ECM.

Run a fuel system leak-down test. Check the cylinder 7 injector for a stuck-open nozzle. Inspect the injector 7 seal for fuel seepage. Test the injector 7 circuit for a short. Replace the leaking injector 7 and its seals. Clear the code and retest.

P02B5

Cylinder 7 - Injector Leaking

System: Injector circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P02B5 means Cylinder 7 - Injector Leaking.

Where it lives

For P02B5, start at the injector the description names. The description of P02B5 puts it on cylinder 7.

Check these first

A leaking injector on cylinder 7
A failed injector 7 O-ring or seal
A short in the cylinder 7 injector circuit
A cracked fuel rail near cylinder 7
A stuck-open injector driver in the ECM

What to do next

Run a fuel system leak-down test
Check the cylinder 7 injector for a stuck-open nozzle
Inspect the injector 7 seal for fuel seepage
Test the injector 7 circuit for a short
Replace the leaking injector 7 and its seals
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.