AutoCodes – Chevrolet – B0423 Chevrolet

B0423 Chevrolet Code - Right Temperature Control Feedback Circuit

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 Passenger Air Temperature Actuator, Passenger Air Temperature Actuator harness is open or shorted, Passenger 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: B0423 Chevrolet indicates Right Temperature Control Feedback Circuit.
Common causes: Common causes include Faulty Passenger Air Temperature Actuator, Passenger Air Temperature Actuator harness is open or shorted, Passenger 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 20,866

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 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0423 Chevrolet 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 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 Chevrolet - Right Temperature Control Feedback Circuit - AutoCodes.com — B0423 Chevrolet Code - Right Temperature Control Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC B0423 Chevrolet?

Faulty Passenger Air Temperature Actuator
Passenger Air Temperature Actuator harness is open or shorted
Passenger Air Temperature Actuator circuit poor electrical connection

How to Fix the DTC B0423 Chevrolet?

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 does this mean?

Code Tech Notes

B0423:02 Temperature Control 2 Feedback Circuit Short to Ground
B0423:05 Temperature Control 2 Feedback Circuit Short to Battery or Open
B0423:61 Temperature Control 2 Circuit Actuator Stuck

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0423 Chevrolet 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.

Need more information about the B0423 Chevrolet code?

Need more information on how to fix the B0423 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0423 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B0423 2014 Chevrolet Silverado — Right Temperature Control Feedback Circuit
B0423 2015 Chevrolet Silverado — Right Temperature Control Feedback Circuit
B0423 2016 Chevrolet Silverado — Right Temperature Control Feedback Circuit
B0423 2017 Chevrolet Silverado — Right Temperature Control Feedback Circuit
B0423 2018 Chevrolet Silverado — Right Temperature Control Feedback Circuit

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 B0423 Chevrolet Code

1. What are the common symptoms of OBDII code B0423 in a Chevrolet related to the Right Temperature Control Feedback Circuit?

- Common symptoms include inconsistent heating or cooling in the vehicle, the inability to regulate temperature properly, and potential issues with the climate control system.

2. What are the possible causes of OBDII code B0423 for the Right Temperature Control Feedback Circuit in a Chevrolet?

- The code B0423 can be triggered by a faulty temperature control sensor, a malfunctioning blend door actuator, wiring issues, or a problem with the HVAC control module.

3. How can I diagnose the OBDII code B0423 in a Chevrolet related to the Right Temperature Control Feedback Circuit?

- Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the temperature control sensor and blend door actuator, checking the wiring for damage, and testing the HVAC control module.

4. Can I continue to drive my Chevrolet with the OBDII code B0423 for the Right Temperature Control Feedback Circuit?

- It is not recommended to ignore this code, as it can affect the comfort and functionality of your vehicle's climate control system. It is best to address the issue promptly.

5. What are some repair tips for fixing the OBDII code B0423 in a Chevrolet related to the Right Temperature Control Feedback Circuit?

- Repair tips may include replacing the faulty temperature control sensor or blend door actuator, repairing damaged wiring, or reprogramming the HVAC control module if necessary.

6. How much does it typically cost to repair the OBDII code B0423 for the Right Temperature Control Feedback Circuit in a Chevrolet?

- Repair costs can vary depending on the specific cause of the issue, but it may range from $100 to $500, including parts and labor.

7. Can I reset the OBDII code B0423 in a Chevrolet related to the Right Temperature Control Feedback Circuit without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is not recommended as the problem will persist, leading to continued issues with temperature control in your vehicle.

8. Will the OBDII code B0423 for the Right Temperature Control Feedback Circuit cause my Chevrolet to fail an emissions test?

- The code itself may not directly cause a failed emissions test, but it is still important to address it to ensure proper functioning of the vehicle's climate control system.

9. Are there any preventive measures to avoid encountering the OBDII code B0423 in a Chevrolet related to the Right Temperature Control Feedback Circuit?

- Regular maintenance of the HVAC system, checking for any unusual climate control behavior, and addressing any issues promptly can help prevent the occurrence of this code.

10. How long does it typically take to repair the OBDII code B0423 for the Right Temperature Control Feedback Circuit in a Chevrolet?

- The repair time can vary based on the specific cause of the issue and the availability of parts, but it may take anywhere from one to several hours to complete the repair.