AutoCodes – Chevrolet – B0423 2018 Chevrolet Silverado

B0423 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 540

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B0423 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Right Temperature Control Feedback Circuit - AutoCodes.com — B0423 2018 Chevrolet Silverado Code - Right Temperature Control Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC B0423 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the B0423 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0423 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B0423 in a 2018 Chevrolet Silverado?

- Common symptoms include inconsistent or incorrect temperature readings on the right side of the vehicle, issues with the climate control system, and potential fluctuations in cabin temperature.

2. What does the OBDII code B0423 on a 2018 Chevrolet Silverado indicate?

- The B0423 code specifically points to a malfunction in the right temperature control feedback circuit in the vehicle's HVAC system.

3. What are some possible causes of OBDII code B0423 in a 2018 Chevrolet Silverado?

- Potential causes of B0423 can include faulty temperature sensors, damaged wiring or connectors in the right temperature control circuit, or a malfunctioning HVAC control module.

4. How can I diagnose the right temperature control feedback circuit issue related to OBDII code B0423 in my 2018 Chevrolet Silverado?

- Diagnosis typically involves using a scan tool to retrieve the specific trouble codes, testing the temperature sensors, inspecting the wiring for damage, and checking the HVAC control module for functionality.

5. Can I continue to drive my 2018 Chevrolet Silverado with OBDII code B0423?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper climate control functionality and prevent potential discomfort.

6. Are there any DIY repair tips for fixing OBDII code B0423 in a 2018 Chevrolet Silverado?

- DIY repair tips may include checking and cleaning the temperature sensors, inspecting and repairing any damaged wiring, and resetting the HVAC control module to see if the issue resolves.

7. How much does it typically cost to repair OBDII code B0423 in a 2018 Chevrolet Silverado?

- Repair costs can vary based on the exact cause of the issue, but they may range from around $100 for basic repairs like sensor replacement to a few hundred dollars for more complex repairs involving the HVAC system.

8. Can resetting the OBDII code B0423 in a 2018 Chevrolet Silverado fix the issue temporarily?

- Resetting the code may temporarily clear the warning light, but if the underlying problem is not addressed, the code is likely to reappear once the system detects the issue again.

9. Will OBDII code B0423 in a 2018 Chevrolet Silverado affect the vehicle's performance?

- This code is related to the HVAC system and is unlikely to impact the vehicle's overall performance, but it may result in discomfort due to climate control issues.

10. How long does it take to repair OBDII code B0423 in a 2018 Chevrolet Silverado?

- Repair time can vary depending on the exact cause of the issue and the complexity of the repair needed, but it may take anywhere from 1-3 hours for basic repairs to a full day for more extensive diagnostics and fixes.