P2D06Motor Electronics Coolant Pump B Overspeed/Air in System
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D06 says pump B of the motor electronics loop turns above its commanded speed, the classic sign of a pump that has lost its coolant column to air or a falling level. Ford documents a real case: customer satisfaction programme 23B09 covered 72 F-150 Lightning trucks of model years 2022–2023, built between 28 and 30 September 2022, whose high-voltage battery coolant tubes were made of the wrong material. A shrinking tube spigot could leak, and P2D06 could set together with the battery pump code P2B29, without the driver noticing anything; the fix was replacing both tube assemblies. So the leak need not be near pump B itself. Ford's 2024 summary handles overspeed/dry run as type B1. Bleed the loop and look for the leak; stalled is P2D05, underspeed P2D07.
- What you may notice
- Often none apart from the stored code
- Falling level in the degas bottle or traces of coolant
- Inverter overtemperature warning and reduced acceleration if the loss continues
- Likely causes
- LikelyCoolant leak anywhere in the shared loop, such as faulty battery coolant tubes (Ford 23B09)
- LikelyAir left in the loop after filling without the prescribed bleeding procedure
- RareImpeller slipping on the shaft or implausible speed feedback
- 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: €40 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.