The vehicles that use automatic transmission, have the torque converter, between the transmission and the motor, so that the output torque of the engine is higher and pushes the rear wheels of the vehicle. This DTC code is set on vehicles that have automatic transmission, and it means that there may be a problem of driving at any speed. In addition, this code does not exactly indicate a failure in relation to the transmission.
The automatic transmission is controlled by the vehicle’s computer and uses the multiple transmission ratio, in order to increase the vehicle’s speed, in addition to giving the maximum output of the engine’s power output. These vehicles can have up to 4 transmission ratios in order to save fuel.
The computer orders the moment when the change is made between the gears. Either down or up, depends on throttle position and engine speed.
Both the ECM, the PCM and the Transmission Control Module (TCM), use the input of several sensors to ensure that the transmission with its components work in the correct way The speed of the engine is usually defined against the Vehicle Speed Sensor, to specify the transmission ratio and the slip torque converter. If this calculation does not the expected value, the DTC code P0730 is set.