AutoCodes – Chevrolet – B051A 2017 Chevrolet Silverado

B051A 2017 Chevrolet Silverado Code - Left Side Assist Step Motor Control 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: B051A 2017 Chevrolet Silverado indicates Left Side Assist Step Motor Control 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 372

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 13, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B051A 2017 Chevrolet Silverado 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 potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.

OBDII Code B051A 2017 Chevrolet Silverado - Left Side Assist Step Motor Control Circuit - AutoCodes.com — B051A 2017 Chevrolet Silverado Code - Left Side Assist Step Motor Control Circuit

What does this mean?

What are the Possible Causes of the DTC B051A 2017 Chevrolet Silverado?

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 B051A 2017 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

B051A:0B Left Side Assist Step Motor Control Circuit Current Above Threshold
B051A:01 Left Side Assist Step Motor Control Circuit Short to Battery
B051A:02 Left Side Assist Step Motor Control Circuit Short to Ground
B051A:04 Left Side Assist Step Motor Control Circuit Open Circuit

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B051A 2017 Chevrolet Silverado 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 B051A 2017 Chevrolet Silverado code?

Need more information on how to fix the B051A 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B051A 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B051A in a 2017 Chevrolet Silverado?

- Common symptoms include malfunctioning or inoperative left side assist step, illuminated warning lights on the dashboard, and difficulty accessing the vehicle.

2. What does the OBDII code B051A for Left Side Assist Step Motor Control Circuit indicate?

- This code indicates a problem with the control circuit for the left side assist step motor in the Chevrolet Silverado.

3. What are some possible causes of OBDII code B051A in a 2017 Chevrolet Silverado?

- Potential causes include a faulty assist step motor, damaged wiring or connectors, a blown fuse, or a malfunctioning control module.

4. How can I diagnose the issue related to OBDII code B051A in my Chevrolet Silverado?

- Use a diagnostic scanner to retrieve the specific error code, inspect the wiring and connectors for damage, check the fuse related to the assist step motor, and test the motor itself for functionality.

5. What are some tips for repairing OBDII code B051A in a 2017 Chevrolet Silverado?

- Repair options may include replacing the left side assist step motor, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming the control module if needed.

6. Can I still drive my Chevrolet Silverado with OBDII code B051A present?

- It is not recommended to drive the vehicle with this code present, as it may affect the operation of the left side assist step and compromise safety.

7. How much does it typically cost to repair OBDII code B051A in a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is it possible to reset or clear OBDII code B051A in a Chevrolet Silverado without repairing the issue?

- While you can clear the code temporarily with a diagnostic scanner, it will likely reappear until the underlying issue is resolved.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B051A in a 2017 Chevrolet Silverado?

- Depending on the root cause of the issue, some DIY repairs may be possible, such as checking and replacing fuses or repairing damaged wiring. However, more complex issues may require professional assistance.

10. How can I prevent OBDII code B051A from occurring in my Chevrolet Silverado in the future?

- Regularly inspect and maintain the left side assist step system, avoid physical damage to the step, and address any warning signs promptly to prevent this code from appearing.