Code Definition

P0A37 (260) — Drive motor B temperature sensor signal corrupt

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

About P0A37

P0A37 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Toyota vehicles. 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 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

On Toyota hybrid systems the Drive Motor B temperature sensor is a thermistor within the hybrid transaxle that reports motor temperature to the Power Management Control ECU. This form of DTC P0A37 sets when the ECU detects a corrupt or unstable signal from the sensor rather than a steady out of range value. The signal shows irregular, erratic, or implausible fluctuations that do not match the way motor temperature actually behaves, which usually points to electrical noise, an intermittent connection, or a degrading sensor. Because the fault is often intermittent, the code may set under vibrati...

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

Quick Facts