What are the common causes of P0C7A?

A faulty drive motor B inverter. An open or short in the drive motor B inverter harness. A poor electrical connection at the drive motor B inverter connector. An overvoltage condition in the drive motor B inverter circuit.

Read the drive motor B inverter voltage on a scan tool. Check the inverter voltage against the battery pack voltage. Inspect the drive motor B inverter connector and wiring. Test the inverter circuit for open and short faults. Replace the drive motor B inverter if the voltage stays too high. Clear the code and retest.

P0C7A

Drive Motor B Inverter Voltage Too High

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

What it means

P0C7A means Drive Motor B Inverter Voltage Too High.

Check these first

A faulty drive motor B inverter
An open or short in the drive motor B inverter harness
A poor electrical connection at the drive motor B inverter connector
An overvoltage condition in the drive motor B inverter circuit

What to do next

Read the drive motor B inverter voltage on a scan tool
Check the inverter voltage against the battery pack voltage
Inspect the drive motor B inverter connector and wiring
Test the inverter circuit for open and short faults
Replace the drive motor B inverter if the voltage stays too high
Clear the code and retest

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Updated

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