Code Definition

P0A48 — Drive motors B position sensor signal high

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

About P0A48

P0A48 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 P0A48 is stored, the module has detected a signal or supply voltage higher 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 P0A48 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) supplies rotor angle data to the inverter for accurate motor commutation. DTC P0A48 sets when the motor control module detects that the position sensor signal voltage or amplitude has risen above its calibrated upper threshold. A high signal usually results from a short to voltage, a short between the signal and the excitation or reference circuit, or a low resistance fault inside the resolver that produces an invalid rotor position reading. Because t...

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