OBD Codes List

Diagnostic reference · P02B8

P02B8

Cylinder 8 - Injector Restricted

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

What it means

P02B8 means Cylinder 8 - Injector Restricted.

Where it lives

For P02B8, the description names the injector as the part involved. The description of P02B8 puts it on cylinder 8.

Check these first

  • A clogged injector on cylinder 8
  • A weak injector 8 coil
  • Corrosion at the injector 8 connector
  • Contaminated fuel blocking the injector nozzle
  • A failing fuel pump dropping pressure

What to do next

  1. Watch the cylinder 8 injector pulse on a scan tool
  2. Inspect the injector 8 connector and wiring
  3. Check fuel pressure and flow at the rail
  4. Clean or replace the restricted injector 8
  5. Drain and refill with clean fuel if contaminated
  6. Clear the code and retest

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Updated

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