AutoCodes – GMC – B052B 2015 GMC Sierra

B052B 2015 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 2015 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 165
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 18, 2024
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Code B052B 2015 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 2015 GMC Sierra - Assist Step Position Sensor Supply Circuit - AutoCodes.com
B052B 2015 GMC Sierra Code - Assist Step Position Sensor Supply Circuit

What are the Possible Causes of the DTC B052B 2015 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 2015 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 2015 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 B052B 2015 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 B052B 2015 GMC Sierra Code

1. What does the OBDII code B052B mean on a 2015 GMC Sierra?

The B052B code indicates an issue with the Assist Step Position Sensor Supply Circuit, which monitors the position of the motorized assist steps.

2. What are the common symptoms of the B052B code?

Symptoms may include the assist steps not deploying or retracting properly, warning messages on the dashboard, or unusual noises from the step mechanism.

3. What causes the B052B code to appear?

Common causes include a faulty assist step position sensor, damaged wiring or connectors in the supply circuit, or a malfunctioning control module.

4. Can I drive my 2015 GMC Sierra with the B052B code?

Yes, the vehicle is still drivable, but the assist steps may not function correctly, which could be inconvenient or pose a safety risk when entering or exiting the truck.

5. How do I diagnose the B052B code?

Diagnosis involves inspecting the assist step position sensor, checking for damaged or corroded wiring, and using a scan tool to read live data from the control module.

6. How can I fix the B052B code on my GMC Sierra?

Repairs may include replacing the position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the control module if necessary.

7. How much does it cost to repair the B052B code issue?

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

8. Can a blown fuse cause the B052B code?

Yes, a blown fuse in the assist step circuit can disrupt power to the sensor and trigger the code.

9. Do I need to recalibrate the assist steps after fixing the B052B code?

In some cases, recalibration of the assist steps using a scan tool may be necessary after repairs to ensure proper operation.

10. Can I clear the B052B code without fixing the problem?

Clearing the code without addressing the underlying issue will likely cause it to reappear as the fault persists.

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