What are the common causes of P0A68?

A short or electrical fault in the drive motor B phase U circuit. High resistance in the drive motor B windings. Failed power electronics in the inverter. A motor calibration that is incorrect.

Read drive motor B phase U current on a scan tool. Test the phase U circuit for a short. Measure phase U winding resistance on drive motor B. Check the inverter power electronics for failed switching devices. Replace the inverter if phase U current stays high. Clear the code and retest.

P0A68

Drive Motor B Phase U Current High

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P0A68 means Drive Motor B Phase U Current High.

Check these first

A short or electrical fault in the drive motor B phase U circuit
High resistance in the drive motor B windings
Failed power electronics in the inverter
A motor calibration that is incorrect

What to do next

Read drive motor B phase U current on a scan tool
Test the phase U circuit for a short
Measure phase U winding resistance on drive motor B
Check the inverter power electronics for failed switching devices
Replace the inverter if phase U current stays high
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.