B0423 GMC - Temperature Control 2 Feedback
B0423 GMC Possible Causes
- Faulty Passenger Air Temperature Actuator
- Passenger Air Temperature Actuator harness is open or shorted
- Passenger Air Temperature Actuator circuit poor electrical connection
How do I fix code B0423 GMC?Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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DTC B0423 05 - Temperature Control 2 Feedback Circuit Short to Battery or Open
DTC B0423 61 - Temperature Control 2 Circuit Actuator Stuck
Cost of diagnosing the B0423 GMC code
Labor: 1.0The cost of diagnosing the B0423 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
- Engine Light ON (or Service Engine Soon Warning Light)
B0423 GMC DescriptionThe Heating, Ventilation, and Air Conditioning (HVAC) control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 5-volt reference source voltage to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. When the actuator shaft rotates, the voltage on the door position signal circuit changes. The control circuit uses either a 0, 2.5 or 5-volt signal to command the actuator movement. When the actuator is at rest, the control circuit value is 2.5 volts. A 0 or 5-volt control signal commands the actuator movement in opposite directions.
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