OBD Codes List

Diagnostic reference · P01CD

P01CD

Cylinder 2 Injection Timing Performance - Over Retarded

System
Fuel and air metering (P code)
Lamp
Check Engine Light
Category
Powertrain - Fuel/Air Metering

What it means

P01CD means Cylinder 2 Injection Timing Performance - Over Retarded.

Check these first

  • A restricted or clogged injector on cylinder 2
  • A weak injector spray on cylinder 2
  • Air in the fuel rail at cylinder 2
  • Incorrect injector timing from a wrong calibration
  • A worn injector on cylinder 2

What to do next

  1. Compare cylinder 2 injection timing on a scan tool
  2. Check the injector balance on cylinder 2
  3. Inspect the cylinder 2 injector connector and wiring
  4. Test cylinder 2 compression and misfire counters
  5. Replace the cylinder 2 injector if timing stays retarded
  6. Clear the code and retest

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Updated

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