AutoCodes – Generic – B052B:02

B052B:02 Code - Assist Step Position Sensor Supply Circuit Short to Ground

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:02 indicates Assist Step Position Sensor Supply Circuit Short to Ground.
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 332

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:02 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 ground.

OBDII Code B052B:02 - Assist Step Position Sensor Supply Circuit Short to Ground - AutoCodes.com — B052B:02 Code - Assist Step Position Sensor Supply Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B052B:02?

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:02?

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:02 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:02 Code

1. What does the OBDII code B052B:02 mean?

The code B052B:02 indicates a "short to ground" issue in the supply circuit of the assist step position sensor, which monitors the deployment or retraction of powered assist steps on a vehicle.

2. What are the common symptoms of code B052B:02?

Common symptoms include assist steps not deploying or retracting, intermittent operation, or a completely non-functional powered assist step system.

3. What causes the B052B:02 code to trigger?

This code is typically caused by damaged wiring or connectors, a short circuit to ground, a faulty assist step position sensor, or a malfunction in the assist step motor.

4. Can I still drive my vehicle with the B052B:02 code?

Yes, you can generally drive your vehicle, but the powered assist steps may not function properly, which could make entering or exiting the vehicle more difficult, especially for passengers with mobility concerns.

5. How do I diagnose the B052B:02 code?

Start by inspecting the wiring and connectors for damage or corrosion, followed by testing the assist step position sensor and the motor for proper operation with a multimeter.

6. What tools are needed to fix the B052B:02 code?

You’ll need a diagnostic scan tool, a multimeter, wire repair supplies, and potentially replacement parts such as the assist step position sensor or related wiring harnesses.

7. How much does it typically cost to repair the B052B:02 code?

The repair cost depends on the cause, but it can range from $50 to $200 for wiring repairs or sensor replacement, excluding labor costs if done by a professional.

8. Can I fix the B052B:02 code myself?

Yes, if you have basic automotive repair knowledge and tools, you can inspect and replace damaged wiring, connectors, or the assist step position sensor.

9. Does the B052B:02 code always mean the assist step position sensor is faulty?

No, the code may also be triggered by damaged wiring, corroded connectors, or a short circuit elsewhere in the system.

10. What should I do if the B052B:02 code returns after repair?

If the code persists, recheck the wiring and connectors for hidden damage, ensure all repairs were done correctly, and consider inspecting the control module for potential faults.