AutoCodes – Generic – B052B

B052B 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 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 381

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 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 - Assist Step Position Sensor Supply Circuit - AutoCodes.com — B052B Code - Assist Step Position Sensor Supply Circuit

What does this mean?

What are the Possible Causes of the DTC B052B?

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?

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 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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Information for Specific Makes

B052B Buick — Assist Step Position Sensor Supply Circuit
B052B Cadillac — Assist Step Position Sensor Supply Circuit
B052B Chevrolet — Assist Step Position Sensor Supply Circuit
B052B GMC — Assist Step Position Sensor Supply Circuit

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 Code

1. What does OBDII code B052B mean?

B052B indicates an issue with the Assist Step Position Sensor Supply Circuit, which monitors the position of motorized running boards.

2. What are the common symptoms of code B052B?

Symptoms include malfunctioning or unresponsive assist steps, step deployment errors, or warning lights related to the assist step system.

3. What causes OBDII code B052B?

The code is often caused by wiring issues, such as damaged or corroded wires, a faulty position sensor, or problems with the assist step motor.

4. How can I diagnose code B052B?

Diagnose by inspecting the wiring and connectors for damage, testing the position sensor, and checking for voltage at the supply circuit.

5. Can I drive my car with code B052B?

Yes, you can typically drive with this code, but the assist steps may not function properly, which can be inconvenient.

6. How do I fix code B052B?

Repairs may include replacing damaged wiring, cleaning corroded connectors, or replacing the faulty assist step position sensor.

7. What tools are needed to fix code B052B?

You may need a multimeter to test the circuit, electrical wiring tools, and possibly a replacement sensor or assist step motor.

8. Will clearing the code fix B052B?

Clearing the code will remove it temporarily, but the underlying issue must be resolved to prevent the code from returning.

9. How much does it cost to repair code B052B?

The cost depends on the issue but may range from $100 to $500, with higher costs if sensor or motor replacement is necessary.

10. Can a damaged assist step position sensor cause other issues?

Yes, it can lead to problems with step deployment and may trigger additional errors in the vehicleâ€™s automated systems.

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