Faulty Reactor Temperature Sensor
Reactor Temperature Sensor harness is open or shorted
Reactor Temperature Sensor circuit poor electrical connection
Faulty Motor Control Module (Traction)
Engine Light ON (or Service Engine Soon Warning Light)
The voltage control unit (VCU) has a reactor temperature sensor installed, and the motor control module (traction) always monitors the temperature of the VCU. When the input voltage from the reactor temperature sensor remains above the upper limit of the specified value for a set time, the motor control module (traction) detects a malfunction and stores a DTC.