AutoCodes – Generic – B052B:01

B052B:01 Code - Assist Step Position Sensor Supply Circuit Short to Battery

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:01 indicates Assist Step Position Sensor Supply Circuit Short to Battery.
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 261

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:01 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. The Diagnostic Trouble Code (DTC) will be set when the position sensor circuit is shorted to battery voltage.

OBDII Code B052B:01 - Assist Step Position Sensor Supply Circuit Short to Battery - AutoCodes.com — B052B:01 Code - Assist Step Position Sensor Supply Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC B052B:01?

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:01?

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:01 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:01 Code

1. What does the OBDII code B052B:01 mean?

Code B052B:01 indicates a "Assist Step Position Sensor Supply Circuit Short to Battery," meaning there is an electrical issue in the circuit that powers the assist step position sensor.

2. What are the common symptoms of the B052B:01 code?

Symptoms include the assist step not deploying or retracting properly, a warning message on the dashboard, or intermittent operation of the assist step.

3. What causes the B052B:01 code to appear?

The most common causes are a short to battery in the sensor circuit, damaged wiring, a faulty assist step position sensor, or a malfunction in the control module.

4. Can I drive my vehicle with the B052B:01 code active?

Yes, you can drive the vehicle, but the assist step may not operate correctly, which could be an inconvenience or safety concern when entering or exiting the vehicle.

5. How do I diagnose the B052B:01 code?

Start by inspecting the wiring and connectors for damage or corrosion, then test the assist step position sensor for proper operation, and check for voltage irregularities in the circuit.

6. How can I fix the B052B:01 code?

Repairs may include replacing damaged wiring, cleaning or reconnecting corroded connectors, replacing the assist step position sensor, or reprogramming the control module if necessary.

7. How much does it cost to repair the B052B:01 code?

Repair costs vary but typically range from $50 to $200 for wiring repairs or sensor replacement, plus labor costs if performed by a professional.

8. Can a dead battery cause the B052B:01 code?

A dead battery itself won't cause the code, but issues like voltage spikes from jump-starting can potentially damage the circuit and trigger the code.

9. Does clearing the B052B:01 code fix the problem?

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

10. Do I need a professional to fix the B052B:01 code?

While some issues like checking wiring or replacing a sensor can be handled by experienced DIYers, more complex electrical diagnostics may require a professional technician.