Code Definition

P0A6C — Drive motor B phase W current out of range

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0A6C

P0A6C is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0A6C is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0A6C is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

Drive Motor B is the second electric machine in the system, the generator or a second traction motor depending on the vehicle, and the control module monitors the balance of current across its U, V, and W phases to manage operation and protect the inverter. DTC P0A6C sets when the current in Phase W of Drive Motor B is outside its calibrated range, reading too high, too low, or fluctuating relative to the other phases. This can be caused by the Phase W wiring, a poor high voltage connection, an internal motor winding fault, a faulty Phase W current sensor, or a fault in the inverter leg that d...

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