P2DE3Cold Start Fuel Injection Quantity D 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
- P2DE3 is the excess counterpart of P2DE2: during the cold-start strategy path D injected more than commanded. Nobody publishes this exact code, and the big diesel makers show why it is rare: GM's 2025 diesels judge fuel quantity in the SCR warm-up mode with the ordinary A codes P026C/P026D, keeping only rail pressure (P2C1F, more than 16 MPa below target) and injection timing (P05EC) as separate cold-start codes; Ford's 6.7 litre diesel files cold-start fuel balance errors under the cylinder codes. CARB only demands a response check of commanded quantity during cold start from 2026 on. A dripping injector, a stuck pressure regulator or a coolant sensor reading too cold suggest themselves; expect white smoke and fuel smell. P2DDF is the warm case.
- What you may notice
- Check engine light on after a cold start
- White smoke and fuel smell when cold
- Rising oil level over time
- Likely causes
- LikelyInjector of group D dripping
- PossiblePressure regulator sticking, rail pressure too high when cold
- PossibleCoolant temperature sensor reading too cold
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.