AutoCodes – Chevrolet – B051A 2018 Chevrolet Silverado

B051A 2018 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 2018 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 259

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 2018 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 2018 Chevrolet Silverado - Left Side Assist Step Motor Control Circuit - AutoCodes.com — B051A 2018 Chevrolet Silverado Code - Left Side Assist Step Motor Control Circuit

What does this mean?

What are the Possible Causes of the DTC B051A 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the B051A 2018 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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B051A in a 2018 Chevrolet Silverado?

- The common symptoms include inoperative left side assist step, warning lights on the dashboard, and intermittent or erratic operation of the assist step.

2. What can cause the OBDII code B051A to trigger in a 2018 Chevrolet Silverado?

- The code B051A is typically triggered by faults in the left side assist step motor control circuit, such as wiring issues, a faulty motor, or a malfunctioning control module.

3. How can I diagnose the OBDII code B051A in my 2018 Chevrolet Silverado?

- To diagnose the code B051A, you can perform a visual inspection of the wiring and connectors, test the voltage and continuity in the circuit, and use a scan tool to retrieve and interpret the trouble codes.

4. Can I still drive my 2018 Chevrolet Silverado with the OBDII code B051A present?

- It is not recommended to drive your vehicle with the code B051A present, as it indicates a problem with the left side assist step motor control circuit, which may affect the operation of the assist step and pose a safety risk.

5. How can I repair the OBDII code B051A in my 2018 Chevrolet Silverado?

- Repairing the code B051A may involve repairing or replacing damaged wiring, replacing the left side assist step motor, or reprogramming the control module. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Are there any DIY tips for resolving the OBDII code B051A in a 2018 Chevrolet Silverado?

- While some basic troubleshooting steps can be performed, such as checking for loose connections or damaged wires, complex repairs and component replacements for the code B051A may require specialized tools and expertise, so it's advisable to seek professional help.

7. Will resetting the OBDII code B051A in my 2018 Chevrolet Silverado make it go away permanently?

- Resetting the code B051A may clear the warning lights temporarily, but if the underlying issue in the left side assist step motor control circuit is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.

8. Is the OBDII code B051A a common issue in 2018 Chevrolet Silverado vehicles?

- While the code B051A related to the left side assist step motor control circuit may not be extremely common, it can occur in 2018 Chevrolet Silverado models due to various factors like wiring issues, component failures, or environmental factors.

9. Can extreme weather conditions contribute to triggering the OBDII code B051A in a 2018 Chevrolet Silverado?

- Yes, extreme weather conditions like excessive moisture, salt, or temperature fluctuations can potentially damage the wiring or components in the left side assist step motor control circuit, leading to the triggering of the code B051A.

10. How much can I expect to pay for repairing the OBDII code B051A in my 2018 Chevrolet Silverado?

- The cost of repairing the code B051A can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It's recommended to obtain quotes from reputable repair shops or dealerships to get an accurate estimate.