AutoCodes – GMC – B0413 2018 GMC Sierra

B0413 2018 GMC Sierra Code - Main 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 Drivers Air Temperature Actuator, Drivers Air Temperature Actuator harness is open or shorted, Drivers 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: B0413 2018 GMC Sierra indicates Main Temperature Control Feedback Circuit.
Common causes: Common causes include Faulty Drivers Air Temperature Actuator, Drivers Air Temperature Actuator harness is open or shorted, Drivers 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 387

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 B0413 2018 GMC Sierra 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 B0413 2018 GMC Sierra - Main Temperature Control Feedback Circuit - AutoCodes.com — B0413 2018 GMC Sierra Code - Main Temperature Control Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC B0413 2018 GMC Sierra?

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

How to Fix the DTC B0413 2018 GMC Sierra?

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

B0413:02 Main Temperature Control Feedback Circuit Short to Ground
B0413:05 Main Temperature Control Feedback Circuit Short to Battery or Open
B0413:61 Main Temperature Control Feedback Circuit Actuator Stuck Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0413 2018 GMC Sierra 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 B0413 2018 GMC Sierra code?

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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 B0413 2018 GMC Sierra Code

1. What does the OBDII code B0413 indicate on a 2018 GMC Sierra?

The B0413 code signifies an issue in the Main Temperature Control Feedback Circuit, which is part of the HVAC (Heating, Ventilation, and Air Conditioning) system. This code is triggered when there is a fault in the feedback mechanism that reports back the position of the blend door to the HVAC controller.

2. What are the common symptoms of code B0413 in a 2018 GMC Sierra?

Symptoms include inconsistent cabin temperature, the HVAC system not responding correctly to temperature adjustments, and possibly hearing unusual noises from the dash related to blend door movement.

3. What can cause the B0413 code to appear on a 2018 GMC Sierra?

Potential causes include a faulty blend door actuator, damaged wiring or connectors in the feedback circuit, or a malfunctioning HVAC control module.

4. How can I diagnose the B0413 code on my 2018 GMC Sierra?

Diagnosis should start with a visual inspection of the HVAC system's wiring and connectors for any signs of damage or disconnections. Following this, testing the blend door actuator with a multimeter and scanning tool can help determine if it is functioning correctly.

5. What are the steps to repair the B0413 code on a 2018 GMC Sierra?

Repair steps might include replacing a faulty blend door actuator, repairing or replacing damaged wiring, or in some cases, reprogramming or replacing the HVAC control module.

6. Is it safe to drive my 2018 GMC Sierra with the B0413 code active?

While you can still drive your vehicle, the comfort of the cabin may be compromised due to the HVAC system not functioning properly. It's advisable to address the issue promptly to restore full functionality.

7. Will the B0413 code clear on its own once repairs are made on my 2018 GMC Sierra?

After repairs are made, the code will not clear instantly on its own. You will need to use an OBDII scanner to reset the HVAC system and clear the code. Make sure all repairs are done correctly to prevent the code from reappearing.

8. How urgent is it to fix a B0413 code on a 2018 GMC Sierra?

Fixing a B0413 code is moderately urgent, mainly for comfort reasons. If left unaddressed, it could lead to further complications in the HVAC system, potentially resulting in more extensive repairs.