AutoCodes – GMC – B0415 GMC

B0415 GMC Code - Temperature Control Left Feedback Circuit Actuator Low

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 Left Air Temperature Actuator, Left Air Temperature Actuator harness is open or shorted, Left 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: B0415 GMC indicates Temperature Control Left Feedback Circuit Actuator Low.
Common causes: Common causes include Faulty Left Air Temperature Actuator, Left Air Temperature Actuator harness is open or shorted, Left 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 1,002

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 B0415 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 B0415 GMC - Temperature Control Left Feedback Circuit Actuator Low - AutoCodes.com — B0415 GMC Code - Temperature Control Left Feedback Circuit Actuator Low

What does this mean?

What are the Possible Causes of the DTC B0415 GMC?

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

How to Fix the DTC B0415 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 B0415 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 B0415 GMC Code

1. What does the OBDII code B0415 mean on a GMC?

The code B0415 indicates an issue with the Temperature Control Left Feedback Circuit Actuator, specifically detecting a low signal in the circuit.

2. What are common symptoms of the B0415 code?

Symptoms include inconsistent or no temperature control on the left side, unusual clicking noises from the dashboard, or failure of the HVAC system to respond properly.

3. What causes the B0415 code to appear?

The most common causes are a faulty left temperature control actuator, wiring issues such as shorted or damaged wires, or a malfunctioning HVAC control module.

4. Can I drive my GMC with the B0415 code active?

Yes, the vehicle can still be driven, but the HVAC system may not function properly, affecting cabin comfort.

5. How do you diagnose the B0415 code?

Diagnosis involves scanning the vehicle with an OBDII tool, visually inspecting the actuator and wiring, and testing the actuator's electrical connections for proper voltage and signal.

6. How do you fix the B0415 code on a GMC?

Repairing the code may include replacing the left temperature control actuator, repairing or replacing damaged wiring, or reprogramming the HVAC control module if necessary.

7. What tools are needed to fix the B0415 code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and basic hand tools to access and replace the actuator or repair wiring.

8. How much does it cost to repair a B0415 code?

The cost can range from $100 to $400, depending on whether only the actuator needs replacement or if additional wiring or module repairs are required.

9. Can a B0415 code clear itself?

No, the code will not clear itself. Once the issue is fixed, the code must be cleared with an OBDII scanner.

10. How can I prevent the B0415 code from returning?

Regularly inspect and maintain the HVAC system components, ensure wiring is intact, and promptly address any unusual HVAC behavior to avoid recurring issues.