AutoCodes – GMC – B0424 GMC

B0424 GMC Code - Temperature Control Right Feedback Circuit Actuator Range/Performance

Quick Answer

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module controls the HVAC door actuators to regulate the airflow through the HVAC system. Common causes include Faulty Right Air Temperature Actuator, Right Air Temperature Actuator harness is open or shorted, Right Air Temperature Actuator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0424 GMC indicates Temperature Control Right Feedback Circuit Actuator Range/Performance.
Common causes: Common causes include Faulty Right Air Temperature Actuator, Right Air Temperature Actuator harness is open or shorted, Right Air Temperature Actuator circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 11,752

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0424 GMC Description

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 a stepper motor, a logic circuit, and a potentiometer. The potentiometer inside the door actuator allows the module to monitor the current position of the actuator drive shaft. The module supplies a 5-volt source voltage to the potentiometer on the 5-volt reference circuit. The module supplies ground to the potentiometer through the low reference circuit. 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 module converts the voltage value to a count value where 1-volt is approximately equal to 51 counts. The HVAC control module calibrates the travel range of the HVAC door actuators when it is initially powered by the battery positive voltage circuit. During calibration, the module commands the actuators in each direction until door travel is stopped. The module stores the minimum door positions and the maximum door positions of each actuator into memory. The total travel range is calculated by subtracting the minimum door position from the maximum door position.

OBDII Code B0424 GMC - Temperature Control Right Feedback Circuit Actuator Range/Performance - AutoCodes.com — B0424 GMC Code - Temperature Control Right Feedback Circuit Actuator Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0424 GMC?

Faulty Right Air Temperature Actuator
Right Air Temperature Actuator harness is open or shorted
Right Air Temperature Actuator circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0424 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0424 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0424 GMC Code

1. What are common symptoms of OBDII code B0424 GMC?

- Common symptoms include inconsistent temperature control on the right side of the vehicle, fluctuating cabin temperature, and potential issues with the HVAC system.

2. What could cause OBDII code B0424 GMC to trigger?

- The code B0424 GMC is typically triggered by a malfunction in the right feedback circuit actuator related to temperature control in the HVAC system.

3. How can I diagnose the cause of OBDII code B0424 GMC?

- Diagnosis involves checking the actuator motor, wiring connections, and sensors related to the right temperature control feedback circuit for any faults or malfunctions.

4. What are the repair options for OBDII code B0424 GMC?

- Repair options may include replacing the faulty actuator motor, repairing or replacing damaged wiring, recalibrating the HVAC system, or resetting the trouble code with a diagnostic tool.

5. Can I drive my vehicle with OBDII code B0424 GMC?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential discomfort from inconsistent temperature control.

6. How do I reset OBDII code B0424 GMC after making repairs?

- After making necessary repairs, you can reset the trouble code by using an OBDII scan tool to clear the code and turn off the Check Engine Light.

7. Are there any preventive maintenance measures to avoid OBDII code B0424 GMC?

- Regularly servicing the HVAC system, checking for any unusual temperature control issues, and addressing them promptly can help prevent the recurrence of this trouble code.

8. Can extreme weather conditions affect OBDII code B0424 GMC?

- Extreme weather conditions, such as extreme heat or cold, can potentially exacerbate the symptoms associated with this code due to increased stress on the HVAC system.

9. Is it possible to troubleshoot OBDII code B0424 GMC at home?

- While basic troubleshooting like checking fuses and connections can be done at home, diagnosing and repairing the specific components related to this code may require professional expertise.

10. How long does it typically take to repair OBDII code B0424 GMC?

- The repair time for OBDII code B0424 GMC can vary depending on the exact cause of the issue, but it may take anywhere from 1-3 hours to diagnose and fix the problem.