B0423 GMC - Temperature Control 2 Feedback

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

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

First diagnose B0423 GMC code

    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 terminals.

B0423 GMC 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 GMC code

    Labor: 1.0

    The cost of diagnosing the B0423 GMC 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 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0423 GMC 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.
OBDII Code B0423 GMC - Temperature Control 2 Feedback - Engine-Codes.com

B0423 GMC More Information

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