Powertrain, generic · Hybrid propulsion

P0AED Drive Motor Inverter Temperature Sensor A Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

The inverter of an electric drive motor carries thermistors near its power switches so the controller can derate before the IGBTs overheat. In GM's hybrid tables, inverter temperature sensor A is the phase U sensor of the inverter for motor A. P0AED is the general circuit code for it, used for an electrical fault that is not classified as low, high or erratic. No manufacturer documents this exact code publicly; GM reports the specific siblings P0AEE, P0AEF and P0AF0 instead. CARB requires monitoring of hybrid components and their sensors for circuit faults. Without a valid inverter temperature the controller has to assume the worst and usually limits motor torque. The sensor is built into the power inverter module, so repair often means replacing that unit.

Likely causes

Internal fault of the sensor inside the power inverter module
Corroded or loose connector at the inverter module
Software fault in the motor control processor

Symptoms

  • Hybrid system warning or check engine lamp
  • Reduced electric drive power
  • Possible loss of electric drive

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–4,000
Time1–6 h

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

Parts involved

drive motor inverter temp sensor ahybrid control modulewiring harness

Related codes

P0AEEP0AEFP0AF0P0AF1P0AF2P0A3C

References: law.cornell.edu, gsi.ext.gm.com.