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Engine-Codes – GMC – B051B 2014 GMC Sierra

B051B 2014 GMC Sierra Code - Right Side Assist Step Motor Control Circuit

Quick Answer

The B051B diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Right Side Assist Step Motor Control Circuit. Common causes include Faulty right side assist step motor, Damaged wiring or connectors in the control circuit, Corrosion or poor connections in the circuit components. 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
B051B 2014 GMC Sierra indicates Right Side Assist Step Motor Control Circuit.
Common causes
Common causes include Faulty right side assist step motor, Damaged wiring or connectors in the control circuit, Corrosion or poor connections in the circuit components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code B051B 2014 GMC Sierra Description

The B051B diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Right Side Assist Step Motor Control Circuit. This code indicates that there is a malfunction in the control circuit for the motor that operates the right side assist step on the vehicle. The assist step motor control circuit is responsible for controlling the movement of the assist step, which extends and retracts to aid passengers in entering and exiting the vehicle. When this circuit malfunctions, it can lead to issues with the operation of the assist step, potentially causing inconvenience and safety concerns for passengers.

OBDII Code B051B 2014 GMC Sierra - Right Side Assist Step Motor Control Circuit
B051B 2014 GMC Sierra Code - Right Side Assist Step Motor Control Circuit

Common Causes of B051B 2014 GMC Sierra

  1. Faulty right side assist step motor.
  2. Damaged wiring or connectors in the control circuit.
  3. Corrosion or poor connections in the circuit components.
  4. Issues with the control module responsible for the assist step motor.
  5. Environmental factors such as moisture or debris affecting the circuit.

Symptoms of B051B 2014 GMC Sierra

  1. Right side assist step fails to extend or retract.
  2. Unusual noises coming from the right side assist step motor.
  3. Erratic movement of the right side assist step.
  4. Warning light on the dashboard indicating an issue with the assist step.

How to Fix B051B 2014 GMC Sierra

  1. Begin by diagnosing the specific cause of the malfunction using a scan tool to retrieve the DTC and inspecting the components of the right side assist step motor control circuit.
  2. Check the wiring, connectors, and control module for any visible damage or corrosion. Repair or replace any damaged components as needed.
  3. Test the right side assist step motor to ensure it is functioning correctly. Replace the motor if it is found to be faulty.
  4. Clear the DTC from the vehicle's system using the scan tool and test the operation of the assist step to verify that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying issues with the control circuit.

Cost to Fix B051B 2014 GMC Sierra

The cost of repairing a malfunction in the right side assist step motor control circuit can vary depending on the specific cause of the issue and the extent of the repair needed. In general, the cost of parts for this repair can range from $100 to $300, with labor costs adding an additional $100 to $200. Overall, the total repair cost for this issue is typically between $200 and $500. However, it is important to note that labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate based on your location and vehicle.

What does this mean?

Tech Notes for B051B 2014 GMC Sierra

B051B:0B Right Side Assist Step Motor Control Circuit Current Above Threshold

B051B:01 Right Side Assist Step Motor Control Circuit Short to Battery

B051B:02 Right Side Assist Step Motor Control Circuit Short to Ground

B051B:04 Right Side Assist Step Motor Control Circuit Open Circuit

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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 B051B 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B051B in a 2014 GMC Sierra related to the Right Side Assist Step Motor Control Circuit?

- Common symptoms include inoperative or malfunctioning right-side assist step, intermittent operation of the assist step, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B051B in a 2014 GMC Sierra?

- The code B051B can be triggered by a faulty assist step motor, damaged wiring harness, poor electrical connection, or a malfunctioning control module.

3. How can I diagnose the OBDII code B051B in my 2014 GMC Sierra?

- Use a diagnostic scanner to retrieve the trouble code, inspect the wiring and connectors related to the right-side assist step motor, and perform a comprehensive visual inspection for any visible damage.

4. Can I still drive my 2014 GMC Sierra with OBDII code B051B present?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid any inconvenience or potential safety hazards associated with a malfunctioning assist step.

5. What are some repair tips for fixing OBDII code B051B in a 2014 GMC Sierra?

- Repair tips include checking and repairing any damaged wiring, ensuring proper electrical connections, replacing the assist step motor if necessary, and resetting the trouble code after repairs are completed.

6. Is it possible to reset the OBDII code B051B in a 2014 GMC Sierra without making any repairs?

- While you can clear the code using a diagnostic scanner, it is important to address the underlying issue causing the trouble code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code B051B in a 2014 GMC Sierra?

- The cost of repair can vary depending on the specific issue causing the code, but it may involve expenses related to parts replacement, labor charges, and diagnostic fees.

8. Can a DIY enthusiast fix OBDII code B051B in a 2014 GMC Sierra?

- DIY enthusiasts with automotive repair experience and access to the necessary tools may be able to address simpler issues causing the code, such as checking and repairing wiring connections.

9. Are there any recalls or technical service bulletins related to OBDII code B051B in a 2014 GMC Sierra?

- It's recommended to check with the manufacturer or authorized service centers for any relevant recalls or technical service bulletins that may apply to the specific issue related to this trouble code.

10. How can I prevent OBDII code B051B from occurring in my 2014 GMC Sierra in the future?

- Regular maintenance, timely inspections of the assist step system, and addressing any issues promptly can help prevent the recurrence of OBDII code B051B in your GMC Sierra.

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