B0423 - Temperature Control 2 Feedback
B0423 Possible Causes
- Faulty Passenger Air Temperature Actuator
- Passenger Air Temperature Actuator harness is open or shorted
- Passenger Air Temperature Actuator circuit poor electrical connection
B0423 Tech Notes
DTC B0423 02 - Temperature Control 2 Feedback Circuit Short to Ground
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 code
The cost of diagnosing the B0423 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.
B0423 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
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.
B0423 Information for specific makes