Powertrain, generic · Hybrid propulsion

P0A35 Drive Motor B Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Unlike the sensor codes, P0A35 reports that motor B is actually too hot according to a working sensor. GM's 2011 hybrid tables set it above 149 °C (Type A, one trip); the 2013 two-mode trucks use 200 °C, clear it only below 135 °C and run it only while P0A31 is not active (Type B). Mitsubishi sets it on the rear motor of the 2023 Outlander PHEV when the coil reaches 177 °C for one second and names the motor assembly, electric water pump, EV cooling circuit and radiator fan as suspects. Sustained heavy load, towing or a cooling fault are the usual triggers. P0A2F is the same check for motor A, P0A3D for the motor B inverter. The system cuts motor B torque until it has cooled down.

Likely causes

Electric coolant pump of the drive cooling circuit failed or weak
Low coolant or transmission fluid in the motor cooling path
Radiator fan not running or radiator blocked
Extended high load such as towing or long climbs

Symptoms

  • Noticeable loss of electric drive power
  • Hybrid system overheat or warning message
  • Engine runs more often to compensate

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–4,000
Time1–8 h

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

Parts involved

drive motor bdrive motor b temp sensor

Related codes

P0A31P0A32P0A33P0A3DP0A2F

References: gsi.ext.gm.com, gsi.ext.gm.com, mitsubishitechinfo.com.