Powertrain, generic (extended)

P2D0B Motor Electronics Coolant Pump C Overspeed/Air in System

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2D0B is stored when pump C of the motor electronics loop reaches a speed above the commanded value. Since a pump with air around its impeller loses load and accelerates, the code is first of all a hint at a low level, a leak or incomplete bleeding; a third pump in a branch that sits high in the vehicle is especially prone to trapping air. No manufacturer publicly documents P2D0B. A published example of the same fault on another pump exists: on certain 2022–2023 F-150 Lightning trucks Ford found P2D06, the pump B version, after leaking battery coolant tubes (programme 23B09). In Ford's 2024 summary, overspeed together with dry running forms fault type B1. Fill and bleed per the service procedure and pressure-test the loop. A stalled pump C is P2D0A, a slow one P2D0C. Left alone, the electronics heat up and power drops.

Likely causes

Air trapped in the pump C branch after incomplete bleeding
Coolant loss through a leak in the loop
Loose impeller or false speed signal from the pump

Symptoms

  • Warning lamp on, sometimes without other effects
  • Coolant level below minimum or visible leak traces
  • Gurgling noise from the pump area

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€40–800
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

motor electronics coolant pump cpower electronics coolant loop

Related codes

P2D0AP2D0CP2D01P2D06P2BD7

References: law.cornell.edu, static.nhtsa.gov, fordservicecontent.com.