Code Definition

P0A37 — Drive motor B temperature sensor signal out of range

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

About P0A37

P0A37 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 P0A37 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; 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 P0A37 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 a traction motor in a hybrid or electric vehicle drive system, and its temperature is tracked by a thermistor type sensor that is often integrated into the motor windings or the inverter. DTC P0A37 sets when the powertrain or motor control module sees the signal voltage from the Drive Motor B temperature sensor sitting outside the valid range, either too high or too low to represent a plausible temperature. An out of range high voltage usually corresponds to an open circuit or a sensor reading extremely cold, while an out of range low voltage usually corresponds to a short to ...

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