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Engine-Codes – GMC – B052B 2016 GMC Sierra

B052B 2016 GMC Sierra Code - Assist Step Position Sensor Supply Circuit

Quick Answer

The B052B diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Assist Step Position Sensor Supply Circuit. Common causes include Faulty assist step position sensor, Wiring issues or electrical connections related to the sensor circuit, Corrosion or damage to the sensor or its mounting. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B052B 2016 GMC Sierra indicates Assist Step Position Sensor Supply Circuit.
Common causes
Common causes include Faulty assist step position sensor, Wiring issues or electrical connections related to the sensor circuit, Corrosion or damage to the sensor or its mounting.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B052B 2016 GMC Sierra Description

The B052B diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Assist Step Position Sensor Supply Circuit. This code indicates that there is a malfunction in the circuit responsible for supplying power to the assist step position sensor. The assist step position sensor is a component that helps control the deployment and retraction of the vehicle's power running boards or steps.

OBDII Code B052B 2016 GMC Sierra - Assist Step Position Sensor Supply Circuit
B052B 2016 GMC Sierra Code - Assist Step Position Sensor Supply Circuit

Common Causes of B052B 2016 GMC Sierra

  1. Faulty assist step position sensor.
  2. Wiring issues or electrical connections related to the sensor circuit.
  3. Corrosion or damage to the sensor or its mounting.
  4. Issues with the power supply to the sensor.
  5. Software or programming issues related to the sensor system.

Symptoms of B052B 2016 GMC Sierra

  1. Power running boards fail to deploy or retract properly.
  2. Unusual noises coming from the power running boards during operation.
  3. Warning light on the dashboard indicating a problem with the assist step system.
  4. Inconsistent operation of the power running boards.

How to Fix B052B 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the assist step position sensor and its wiring for any visible damage or corrosion.
  2. Test the sensor's functionality using a multimeter to check for proper voltage and resistance readings.
  3. If the sensor is found to be faulty, replace it with a new, OEM-quality part.
  4. Check and repair any damaged wiring or connections in the sensor circuit.
  5. Reset the vehicle's computer system to clear the DTC and ensure proper operation of the power running boards.

Cost to Fix B052B 2016 GMC Sierra

The cost of repairing a B052B code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the parts for this repair, including a new assist step position sensor, can range from $100 to $300. Labor costs can add an additional $100 to $200, with total repair costs falling between $200 and $500. Keep in mind that prices may fluctuate based on location, vehicle make and model, and the expertise of the auto repair shop. It's recommended to obtain quotes from multiple shops to ensure a competitive price.

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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 B052B 2016 GMC Sierra Code

1. What does the OBDII code B052B mean on a 2016 GMC Sierra?

Code B052B indicates an issue with the Assist Step Position Sensor Supply Circuit, which monitors and supplies power to the motorized assist steps.

2. What are the symptoms of code B052B in a 2016 GMC Sierra?

Common symptoms include the assist steps not deploying or retracting properly, a warning message on the dashboard, or intermittent operation of the power steps.

3. What causes the B052B code to appear?

Possible causes include damaged wiring or connectors in the assist step circuit, a faulty position sensor, a malfunctioning assist step motor, or a blown fuse.

4. How can I diagnose the B052B code on my 2016 GMC Sierra?

Start by visually inspecting the wiring and connectors for damage or corrosion, check the fuses, and use a multimeter to test the assist step position sensor and related circuits.

5. Can I still drive my GMC Sierra with the B052B code?

Yes, the vehicle is still drivable, but the assist steps may not function correctly, which can affect accessibility and convenience.

6. How do I fix the B052B code on a 2016 GMC Sierra?

Repairs may include replacing damaged wiring, cleaning corroded connectors, replacing the assist step position sensor, or repairing/replacing the motorized step assembly.

7. How much does it cost to repair the B052B code in a 2016 GMC Sierra?

The cost can vary depending on the repair. Wiring or connector repairs may be inexpensive, while replacing the assist step motor or position sensor could cost $200–$600 or more, including labor.

8. Can a faulty assist step motor cause the B052B code?

Yes, a malfunctioning assist step motor can lead to issues in the position sensor supply circuit and trigger the B052B code.

9. Does clearing the B052B code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem. The code is likely to reappear until proper repairs are made.

10. Is the B052B code specific to the GMC Sierra?

While this code is commonly associated with GMC vehicles like the Sierra, it can also appear in other GM vehicles equipped with motorized assist steps.

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