Powertrain, generic (extended)

P2DAF Drive Motor A Temperature Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2DAF is the high-side counterpart: the sensor B voltage rises close to the reference. For an NTC probe that would be an impossibly cold winding, so the controller treats it as an interrupted circuit – broken lead, unplugged or corroded connector, cracked thermistor – or, less often, a short to a supply voltage. A UAES patent on stator sensor diagnosis describes the principle: upper and lower voltage limits sit just inside the supply rails, and a reading outside them counts as a circuit fault before any plausibility logic runs. Mitsubishi's equivalent for the V-phase probe of its Outlander PHEV (2023) is P3052, set once the signal reaches 4.93 V and stays there half a second. No manufacturer publishes P2DAF. The low side is P2DAE. Without sensor B the inverter may hold back torque to protect the winding.

Likely causes

Open signal or ground lead of sensor B
Connector unplugged or terminal backed out, often after drive unit work
Thermistor open or cracked inside the stator
Signal lead shorted to a supply voltage

Symptoms

  • Hybrid system warning or check engine light
  • Sensor B shows an implausibly low temperature in live data
  • Electric drive power limited

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time1–12 h

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

Parts involved

drive motor a temp sensor bwiring harnessinverter

Related codes

P2DACP2DADP2DAEP0A2DP2DB4

References: law.cornell.edu, mitsubishitechinfo.com, patents.google.com.