OBD Codes List

Diagnostic reference · P02B1

P02B1

Cylinder 6 - Injector Leaking

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

What it means

P02B1 means Cylinder 6 - Injector Leaking.

Where it lives

For P02B1, the description names the injector as the part involved. The description of P02B1 puts it on cylinder 6.

Check these first

  • Cylinder 6 injector stuck open and dribbling fuel
  • Worn pintle or seat inside the cylinder 6 injector
  • Excess fuel pressure forcing the cylinder 6 injector to leak
  • Damaged O-ring or seal on the cylinder 6 injector
  • Grounded pulse holding the cylinder 6 injector open

What to do next

  1. Pull the rail and pressure-test the cylinder 6 injector for drip
  2. Check fuel pressure and regulator operation
  3. Inspect the cylinder 6 injector O-ring and seat
  4. Compare cylinder 6 injector resistance and pulse to the others
  5. Replace the cylinder 6 injector if it will not hold pressure
  6. Clear the code and retest

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Updated

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