B0423 BUICK 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 is the B0423 BUICK code repair?
Start by checking 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.Tech Notes
DTC B0423 02 - Temperature Control 2 Feedback Circuit Short to GroundDTC B0423 05 - Temperature Control 2 Feedback Circuit Short to Battery or Open
DTC B0423 61 - Temperature Control 2 Circuit Actuator Stuck
What is the cost to diagnose the B0423 BUICK code
Labor: 1.0
The cost to diagnose the B0423 BUICK code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0423 BUICK Meaning
The 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.More Information
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