P2DE1Cold Start Fuel Injection Quantity C Higher Than Expected
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2DE1 is the only code of this family with public manufacturer use. Honda names it Cold Start Air Fuel Ratio Control System Rich: during the cold-start emission strategy the PCM checks whether the mixture measured by the LAF (wide-band) sensor is richer than commanded. Bulletin 22-009 for the 2021 Accord Hybrid says the LAF sensor may misjudge the mixture as rich under certain fuel and shutdown conditions; bulletin 23-100 for the 2021-22 HR-V blames a PCM miscalculation. Both cure it with new PGM-FI software and light the MIL. Version 2 of 23-100 also has the oil level checked after a warm-up and the oil changed if above the upper mark. Real causes besides software are leaking injectors and faulty air or coolant temperature signals.
- What you may notice
- Check engine light on after a cold start
- Usually no noticeable driving problem
- Oil level above the upper mark possible
- Likely causes
- LikelyPCM software (Honda bulletins 22-009, 23-100)
- PossibleInjector leaking, extra fuel during cold start
- PossibleCoolant temperature or airflow signal wrong
- RareAir-fuel ratio (LAF) sensor faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.