B0193 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B0193 – Front Blower Motor Speed Circuit


B0193 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B0193 Possible Causes


Faulty Front Blower Motor,Front Blower Motor harness is open or shorted,Front Blower Motor circuit poor electrical connection,Faulty Blower Motor Control Module


B0193 Description


The Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the blower motor. The blower motor speed control from the HVAC control module, battery positive and ground circuits enable the blower motor control module to operate. The HVAC control module provides a Pulse Width Modulation (PWM) signal to the blower motor control module in order to command the blower motor speed. The blower motor control module transfers the PWM signal into a corresponding blower motor voltage. The voltage resides between 2-13 V and changes linear to the height of the PWM signal.