Code Definition

P0A2C (247) — Drive motor A temperature sensor signal low

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

About P0A2C

P0A2C 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 P0A2C 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 P0A2C 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 and Lexus hybrid systems the Power Management Control ECU monitors the Drive Motor A temperature sensor, a thermistor inside the transaxle used for motor thermal protection. DTC P0A2C sets when the ECU detects the sensor signal voltage is lower than the specified threshold for a calibrated period. With the Toyota pull up circuit a low signal voltage corresponds to an abnormally low sensor resistance or a short to ground, which the ECU interprets as an implausibly high motor temperature. When the code is set the system may apply a substitute temperature, limit motor output to protect ...

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