Powertrain, generic · Hybrid propulsion

P0A2D Drive Motor A Temperature Sensor A Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With an NTC thermistor, a high signal voltage stands for a cold motor, and a voltage close to the 5 V pull-up means the circuit is open. GM sets P0A2D on its 2013 two-mode trucks when the reading falls below -40 °C, Type B over two trips; if the fault is already present at start-up it waits until the motor has warmed up under load for at least 1.5 minutes. The 2011 table uses -41 °C, the 2013 MGU mild hybrid -48 °C with torque above 10 Nm. Typical causes are a broken signal or ground wire, an unplugged connector or an open sensor. Hyundai checks the sensor resistance at the transaxle connector. P0A2C is the low-voltage counterpart. Motor protection is lost, so electric power is limited.

Likely causes

Open signal or ground wire of the motor temperature sensor
Connector unplugged or terminal pushed out, often after drive unit work
Thermistor open inside the motor or transaxle
Signal wire shorted to a supply voltage

Symptoms

  • Hybrid system warning or check engine light
  • Motor temperature shows about -40 degrees 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 amotor temperature sensor

Related codes

P0A2AP0A2BP0A2CP2DAF

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.