Code Definition

P0A47 — Drive motor B position sensor signal low

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

About P0A47

P0A47 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 P0A47 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a sensor-related fault — the reported value from the named sensor is out of spec.

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 P0A47 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 one of the high voltage motor generators in the hybrid or electric drive system, and its position sensor (typically a resolver) reports rotor angle to the inverter so the motor windings can be commutated accurately. DTC P0A47 sets when the motor control module detects that the position sensor signal has fallen below its calibrated minimum voltage or amplitude threshold. This low signal usually points to high resistance, an open circuit, a short to ground, or a collapsed resolver excitation feed that prevents the inverter from correctly interpreting motor position. Because accu...

Join TaT to view the complete code information and diagnostic details.

Quick Facts