Powertrain, generic · Hybrid propulsion

P0A2F Drive Motor A Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Unlike its siblings, P0A2F reports a real thermal problem: the sensor works, but motor A stays too hot. GM sets it on 2013 two-mode trucks when the temperature exceeds 200 °C and does not fall below the 135 °C reset level, Type B, provided no circuit or plausibility fault is active. The 2011 table uses 159 °C; on the 2013 MGU mild hybrid the limit is 165 °C, and torque is already cut linearly from 100 % to zero between 155 and 165 °C. Hyundai lists the code in its Sonata Hybrid sensor bulletin, so a skewed sensor can mimic it. McLaren handles over-temperature under P0A2B98 and points to the dielectric cooling circuit. Expect a warning and sharply reduced electric power.

Likely causes

Motor cooling failure such as a weak pump, low fluid or blocked cooler
Sustained high load such as towing or long climbs in electric mode
Temperature sensor reading too high while still within range

Symptoms

  • Hybrid system or check engine warning
  • Electric drive power drops sharply or is cut
  • Engine runs more often to support the drive

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time1–8 h

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

Parts involved

drive motor adrive motor a temp sensor amotor electronics coolant pump

Related codes

P0A2BP0A2CP0A2DP0A35P0A3C

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