Powertrain, generic · Hybrid propulsion

P0A2B Drive Motor A Temperature Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

This is the rationality check: after a long soak, motor A's temperature should match other temperatures in the drive. GM compares it with the average inverter module temperature on its 2013 two-mode trucks and sets P0A2B, Type B, if they differ by more than 28 °C after at least 360 minutes off; the 2011 table uses 20 °C against coolant and transmission fluid, the 2013 MGU mild hybrid 25 °C. Hyundai's Sonata Hybrid bulletin lists the code with resistance specs for the NTC; Audi pairs it on the A7 e quattro with P0A2E and a worn connector. McLaren also files over-temperature under P0A2B98. P0A2C/P0A2D are hard electrical faults, P0A2F real heat. Expect reduced electric power.

Likely causes

Thermistor drifted out of its resistance curve
Added resistance from a worn or corroded connector (Audi A7 e quattro)
Fault in a reference temperature such as inverter or fluid temperature
Motor cooling problem that makes a real temperature look implausible

Symptoms

  • Hybrid system warning or check engine light
  • Electric drive power limited
  • Motor temperature far off from other temperatures after a cold soak

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–4,000
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

P0A2AP0A2CP0A2DP0A2FP2DADP0AEE

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