AutoCodes – GMC – B052B 2016 GMC Sierra

B052B 2016 GMC Sierra Code - Assist Step Position Sensor Supply 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 Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left 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: B052B 2016 GMC Sierra indicates Assist Step Position Sensor Supply Circuit.
Common causes: Common causes include Faulty Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left 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 252

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 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B052B 2016 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 hall-effect switch. The module supplies a low reference and 10 V reference source voltage to the hall-effect switch. The assist step control module monitors the signal from the hall effect switch on the signal circuit. When the actuator shaft rotates, the hall-effect switch provides pulses to the assist step control module which uses the pulses as counts to determine the location of the assist steps. The assist step control module supplies the actuator motor with a 12 V control circuit and a ground control circuit. The assist step control module controls the direction of the actuator by changing the polarity of the control circuits.

OBDII Code B052B 2016 GMC Sierra - Assist Step Position Sensor Supply Circuit - AutoCodes.com — B052B 2016 GMC Sierra Code - Assist Step Position Sensor Supply Circuit

What does this mean?

What are the Possible Causes of the DTC B052B 2016 GMC Sierra?

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

How to Fix the DTC B052B 2016 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B052B 2016 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.

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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 $200â€“$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.