Powertrain, generic · Hybrid propulsion

P0A6E Drive Motor B Phase W Current High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0A6E indicates excessive current, measured or real, in phase W of drive motor B. No manufacturer documents P0A6E publicly. On the motor A side, Hyundai's 2017 Ioniq Hybrid campaign shows the typical real-world pattern: coolant leaking inside the traction motor set phase-high codes for U, V and W alongside a high-voltage isolation fault, with motor replacement once the leak is confirmed. A Toyota patent describes the protective logic: if current runs far above the command, the inverter is at risk, so the system stops switching and opens the relays. CARB requires monitoring of electric drive components. P0A6D is the low side, P0A68 and P0A6B the U and V phases, P0A65 motor A. Drive from motor B is lost until repair.

Likely causes

Insulation breakdown or winding short in phase W (moisture, coolant)
Shorted switch in the phase W leg of the inverter
Phase W current sensor reading too high

Symptoms

  • MIL and hybrid warning, possibly with an isolation fault
  • Motor B no longer drives; possible air conditioning shutdown

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€400–7,000
Time2–10 h

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

Parts involved

drive motor b phase winverter

Related codes

P0A6CP0A6DP0A68P0A6BP0A65

References: static.nhtsa.gov, patents.google.com, law.cornell.edu.