AutoCodes – GMC – B051B 2014 GMC Sierra

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

Quick Answer

The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Common causes include Faulty Right Side Assist Step Motor, Right Side Assist Step Motor harness is open or shorted, Right Side Assist Step Motor 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: B051B 2014 GMC Sierra indicates Right Side Assist Step Motor Control Circuit.
Common causes: Common causes include Faulty Right Side Assist Step Motor, Right Side Assist Step Motor harness is open or shorted, Right Side Assist Step Motor 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 188

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 Nov 13, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B051B 2014 GMC Sierra Description

The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.

OBDII Code B051B 2014 GMC Sierra - Right Side Assist Step Motor Control Circuit - AutoCodes.com — B051B 2014 GMC Sierra Code - Right Side Assist Step Motor Control Circuit

What does this mean?

What are the Possible Causes of the DTC B051B 2014 GMC Sierra?

Faulty Right Side Assist Step Motor
Right Side Assist Step Motor harness is open or shorted
Right Side Assist Step Motor circuit poor electrical connection
Faulty Assist Step Control (ASC) Module

How to Fix the DTC B051B 2014 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

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B051B 2014 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 B051B 2014 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 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.