Powertrain, generic · Hybrid propulsion

P0A2E Drive Motor A Temperature Sensor A Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0A2E flags short jumps or dropouts in the motor A temperature signal that are too brief or too erratic for the low/high checks. Bentley documents it for the Bentayga PHEV and Flying Spur Hybrid 2020-23: the resistance in the sensor crimp changes suddenly at high temperature, and only the sensor has to be replaced, although the engine and gearbox come out to reach it. Audi lists it on the 2021-22 A7 e quattro together with P0A4000 and/or P0A2B00, caused by contact wear in a coupling connector, fixed with new gold-plated pins. Siblings: P0A2C/P0A2D for a steady out-of-range signal, P2DB0 for sensor B. The car shows a MIL or HV warning and may limit electric drive.

Likely causes

Worn contacts in a coupling connector of the sensor line (Audi A7 e quattro)
Resistance jumps in the sensor crimp at high temperature (Bentley hybrids)
Chafed or loosely routed sensor wire with intermittent contact

Symptoms

  • Check engine light or high-voltage warning in the cluster
  • Fault comes and goes, often after hard driving
  • Gearbox or electric drive warning on some models

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–5,000
Time2–20 h

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

Parts involved

drive motor a temp sensor awiring harnesshybrid control module

Related codes

P0A2AP0A2BP0A2CP0A2DP0A40P2DB0

References: static.nhtsa.gov, static.nhtsa.gov.