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B051A 2014 GMC Sierra Code - Left Side Assist Step Motor Control Circuit

Quick Answer

The B051A diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the left side assist step motor control circuit. Common causes include Damaged wiring or connectors in the left side assist step motor control circuit, Faulty left side assist step motor, Malfunctioning motor control module. 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
B051A 2014 GMC Sierra indicates Left Side Assist Step Motor Control Circuit.
Common causes
Common causes include Damaged wiring or connectors in the left side assist step motor control circuit, Faulty left side assist step motor, Malfunctioning motor control module.
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 17, 2024
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Code B051A 2014 GMC Sierra Description

The B051A diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the left side assist step motor control circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the motor that operates the left side assist step on the vehicle. The assist step motor is a component that extends and retracts the step to help passengers enter and exit the vehicle more easily. 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 B051A 2014 GMC Sierra - Left Side Assist Step Motor Control Circuit
B051A 2014 GMC Sierra Code - Left Side Assist Step Motor Control Circuit

Common Causes of B051A 2014 GMC Sierra

  1. Damaged wiring or connectors in the left side assist step motor control circuit.
  2. Faulty left side assist step motor.
  3. Malfunctioning motor control module.
  4. Corrosion or moisture in the electrical connections.
  5. Impact damage to the left side assist step.

Symptoms of B051A 2014 GMC Sierra

  1. Left side assist step fails to extend or retract properly.
  2. Unusual noises coming from the left side assist step motor.
  3. Warning light on the dashboard indicating a problem with the assist step.
  4. Assist step gets stuck in the extended or retracted position.
  5. Difficulty entering or exiting the vehicle due to the malfunctioning assist step.

How to Fix B051A 2014 GMC Sierra

  1. Begin by inspecting the wiring and connectors in the left side assist step motor control circuit for any visible damage or corrosion.
  2. Test the left side assist step motor to determine if it is functioning properly or needs to be replaced.
  3. Check the motor control module for any faults or malfunctions that may be causing the issue.
  4. Clear the DTC from the vehicle's computer system after completing the repairs.
  5. Test the left side assist step to ensure that it extends and retracts correctly and that the code does not reappear.

Cost to Fix B051A 2014 GMC Sierra

The cost of repairing the left side assist step motor control circuit can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $100 to $300, while the labor costs can range from $150 to $300. Overall, the total repair cost for addressing this issue may fall between $250 and $600. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the rates charged by the repair shop. It's recommended to obtain quotes from local auto repair shops to get a more accurate cost estimate for this repair.

What does this mean?

Tech Notes for B051A 2014 GMC Sierra

B051A:0B Left Side Assist Step Motor Control Circuit Current Above Threshold

B051A:01 Left Side Assist Step Motor Control Circuit Short to Battery

B051A:02 Left Side Assist Step Motor Control Circuit Short to Ground

B051A:04 Left 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 B051A 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B051A in a 2014 GMC Sierra related to the Left Side Assist Step Motor Control Circuit?

The common symptoms may include inoperative or erratic movement of the left side assist step on the vehicle.

2. What are the possible causes of OBDII code B051A in a 2014 GMC Sierra?

Possible causes may include a faulty assist step motor, damaged wiring or connectors in the circuit, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B051A in my 2014 GMC Sierra?

Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors for damage, and testing the assist step motor for proper functionality.

4. Can I still drive my 2014 GMC Sierra with OBDII code B051A present?

It is generally not recommended to drive the vehicle with this code present, as it may indicate a safety concern with the left side assist step system.

5. How can I repair OBDII code B051A in my 2014 GMC Sierra?

Repairing this code may involve replacing the faulty assist step motor, repairing any damaged wiring or connectors, or reprogramming the control module as necessary.

6. Is it possible to reset OBDII code B051A in a 2014 GMC Sierra without fixing the underlying issue?

While you can clear the code using a scan tool, it is important to address the root cause of the problem to prevent the code from reoccurring.

7. Are there any DIY tips for troubleshooting OBDII code B051A in a 2014 GMC Sierra?

DIY tips may include visually inspecting the wiring and connectors for damage, checking for any loose connections, and ensuring the assist step motor is functioning properly.

8. How much does it typically cost to repair OBDII code B051A in a 2014 GMC Sierra at a professional mechanic or dealership?

The cost of repair can vary depending on the specific issue, but it may involve parts and labor expenses for replacing the assist step motor or repairing the wiring.

9. Can extreme weather conditions affect the occurrence of OBDII code B051A in a 2014 GMC Sierra?

Extreme weather conditions such as moisture or extreme temperatures can potentially damage the wiring or connectors in the left side assist step circuit, leading to the occurrence of this code.

10. Is it necessary to have a professional mechanic diagnose and repair OBDII code B051A in a 2014 GMC Sierra, or can it be done by a DIY enthusiast?

While some DIY enthusiasts may be able to diagnose and repair this code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to ensure safety and functionality.

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