Powertrain, generic · Hybrid propulsion

P0A33 Drive Motor B Temperature Sensor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A33 is stored when the motor B temperature signal stays above its valid voltage range. With GM's NTC thermistor a voltage near 5 V reads as an impossibly cold motor: GM sets it below -41 °C in the 2011 tables (Type A) and below -40 °C on the 2013 two-mode trucks (Type B, two trips). Mitsubishi flags the rear motor of the 2023 Outlander PHEV when the voltage reaches 4.761 V or more for 0.5 s. That pattern points to an open sensor circuit, an unplugged connector or a short to a voltage source. P0A32 is the low-side fault, P0A31 the rationality check, P0A35 the over-temperature code. Because winding temperature is unknown, the system limits electric drive power and shows a warning.

Likely causes

Open sensor circuit or unplugged connector
Spread or corroded terminals at the motor or module connector
Thermistor open inside the motor
Signal wire shorted to a voltage source

Symptoms

  • Hybrid warning or check engine light
  • Motor B temperature shows about -40 °C regardless of conditions
  • Electric drive power limited

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–3,000
Time1–6 h

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

Parts involved

drive motor b temp sensorwiring harnesshybrid control module

Related codes

P0A30P0A31P0A32P0A35P0A2D

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