P2D10Engine Pre-Ignition Above Threshold - Forced Limited Power
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D10 is the escalated form of P2D0F: pre-ignition events have exceeded the threshold, and the engine computer now restricts power to protect pistons and rings. A Ford patent gives an idea of the scale, cutting engine load by about 10 percent after three detected events while also capping boost and enriching the mixture. Volkswagen uses P2D10 on the 2022 Jetta and Taos with the 1.5 L turbo: its 24iR update (November 2022, revised March 2023) and Taos bulletin 01-22-05 name P2D10 when P0196 for the oil temperature sensor is stored as well, and tell technicians not to replace parts before reflashing the ECM. Lexus shows the same pattern under P1378 with a reduced power message. Expect a warning lamp and weak acceleration until the fault is cleared.
- What you may notice
- Noticeably reduced power, often with a warning message
- Check engine or EPC light on
- Knocking noises under load before the limit kicks in
- Likely causes
- LikelyRepeated pre-ignition from low-octane or contaminated fuel
- PossibleEngine software fault, known on VW 1.5 L turbo together with P0196
- PossibleOil droplets, wrong oil grade or fuel-diluted oil in the cylinder
- RarePiston or ring damage that already keeps causing hot spots
- 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: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.