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Engine-Codes – GMC – B051D 2015 GMC Sierra

B051D 2015 GMC Sierra Code - Right Side Assist Step Position Sensor Circuit

Quick Answer

The B051D diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Right Side Assist Step Position Sensor Circuit. Common causes include Faulty position sensor in the right side assist step, Damaged wiring or connectors in the position sensor circuit, Corrosion or poor connections in the circuit. 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
B051D 2015 GMC Sierra indicates Right Side Assist Step Position Sensor Circuit.
Common causes
Common causes include Faulty position sensor in the right side assist step, Damaged wiring or connectors in the position sensor circuit, Corrosion or poor connections in the circuit.
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 15, 2024
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Code B051D 2015 GMC Sierra Description

The B051D diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Right Side Assist Step Position Sensor Circuit. This code indicates that there is a malfunction in the circuit responsible for monitoring the position of the right side assist step on the vehicle. The assist step is a feature that automatically extends and retracts to assist passengers in entering and exiting the vehicle. The position sensor is crucial for ensuring that the step deploys and retracts correctly, providing convenience and safety for passengers.

OBDII Code B051D 2015 GMC Sierra - Right Side Assist Step Position Sensor Circuit
B051D 2015 GMC Sierra Code - Right Side Assist Step Position Sensor Circuit

Common Causes of B051D 2015 GMC Sierra

  1. Faulty position sensor in the right side assist step.
  2. Damaged wiring or connectors in the position sensor circuit.
  3. Corrosion or poor connections in the circuit.
  4. Issues with the control module responsible for monitoring the assist step.
  5. Environmental factors such as water intrusion affecting the circuit.

Symptoms of B051D 2015 GMC Sierra

  1. Right side assist step fails to deploy or retract.
  2. Dashboard warning lights related to the assist step illuminate.
  3. Unusual noises or vibrations when the assist step is in operation.
  4. Inconsistent operation of the right side assist step.
  5. Vehicle may feel unbalanced when the assist step is in use.

How to Fix B051D 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the right side assist step and its components to check for any obvious signs of damage or wear.
  2. Use a diagnostic scan tool to retrieve the specific DTC (B051D) and further pinpoint the exact cause of the issue.
  3. Test the position sensor in the right side assist step to determine if it is functioning correctly or needs replacement.
  4. Inspect the wiring and connectors in the position sensor circuit for any damage or corrosion, repairing or replacing as necessary.
  5. Clear the DTC from the vehicle's memory using the diagnostic scan tool after completing the repair to ensure the issue has been resolved.

Cost to Fix B051D 2015 GMC Sierra

The typical repair costs for addressing the B051D code on a 2015 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, parts for replacing a faulty position sensor or repairing damaged wiring/connectors can range from $100 to $300. Labor costs at an auto repair shop can add an additional $100 to $200, with total repair costs typically falling between $200 and $500.

What does this mean?

Tech Notes for B051D 2015 GMC Sierra

B051D:01 Right Side Assist Step Position Sensor Circuit Short to Battery

B051D:02 Right Side Assist Step Position Sensor Circuit Short to Ground

B051D:22 Right Side Assist Step Position Sensor Circuit Low Time < Minimum

B051D:29 Right Side Assist Step Position Sensor Circuit Too Few Pulses

B051D:2A Right Side Assist Step Position Sensor Circuit Too Many Pulses

B051D:62 Right Side Assist Step Position Sensor Circuit Actuator Stuck Open

B051D:63 Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed

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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 B051D 2015 GMC Sierra Code

1. What does the OBDII code B051D mean for a 2015 GMC Sierra?

B051D indicates an issue with the Right Side Assist Step Position Sensor Circuit, which monitors the position of the retractable assist step on the passenger side.

2. What are the common symptoms of code B051D in a 2015 GMC Sierra?

Common symptoms include the right side assist step not deploying or retracting properly, warning messages on the dashboard, or erratic movement of the step.

3. What causes the B051D code to appear on a 2015 GMC Sierra?

The code can be triggered by a faulty assist step position sensor, damaged wiring or connectors in the sensor circuit, or issues with the control module.

4. How can I diagnose the B051D code on my GMC Sierra?

First, inspect the wiring and connectors for damage or corrosion. Then, test the assist step position sensor for proper operation using a multimeter or diagnostic tool.

5. Can I still drive my GMC Sierra with the B051D code active?

Yes, you can drive the vehicle, but the right side assist step may be inoperable or unsafe to use until the issue is resolved.

6. How do I fix the B051D code on my 2015 GMC Sierra?

Repairs may include replacing the faulty position sensor, repairing damaged wiring, or cleaning corroded connectors in the sensor circuit.

7. How much does it cost to fix the B051D code?

Repair costs vary but typically range from $100 to $300, depending on whether the sensor or wiring requires replacement.

8. Can a B051D code be caused by a software issue?

While rare, a software issue in the control module could potentially cause this code. Updating or reprogramming the module may be necessary in some cases.

9. Is it possible to clear the B051D code without fixing the problem?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.

10. How can I prevent the B051D code from recurring?

Regularly inspect and maintain the assist step mechanism, including keeping the sensor and wiring clean and free of debris or corrosion.

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