AutoCodes – GMC – B051C 2018 GMC Sierra

B051C 2018 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

Q: 1. What are the common symptoms of OBDII code B051C in a 2018 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

The common symptoms include the left side assist step not deploying or retracting properly, warning lights on the dashboard, and potential issues with the assist step's functionality.

Q: 2. What are the possible causes of OBDII code B051C in a 2018 GMC Sierra?

The code B051C typically indicates a fault with the left side assist step position sensor circuit, which could be caused by wiring issues, a faulty sensor, or a malfunction in the control module.

Q: 3. How can I diagnose the OBDII code B051C in a 2018 GMC Sierra?

Diagnosing the code involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors related to the left side assist step position sensor circuit, and testing the sensor for proper functionality.

Q: 4. What are some repair tips for fixing OBDII code B051C in a 2018 GMC Sierra?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the left side assist step position sensor if necessary, and resetting the fault code using an OBDII scanner after the repairs are completed.

Q: 5. Can I drive my 2018 GMC Sierra with OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit?

It is generally recommended to address the issue promptly to ensure the proper functioning of the left side assist step. Driving with this code may result in the assist step not working correctly when needed.

Q: 6. Is it possible to reset OBDII code B051C in a 2018 GMC Sierra without repairing the issue?

While you can clear the fault code using an OBDII scanner, it is crucial to address the underlying problem causing the code to prevent future issues with the left side assist step position sensor circuit.

Q: 7. How much does it cost to repair OBDII code B051C in a 2018 GMC Sierra at a dealership or a repair shop?

The cost of repair can vary depending on the specific cause of the issue, but it may involve diagnostic fees, parts replacement costs, and labor charges. It is advisable to obtain quotes from different service providers.

Q: 8. Can extreme weather conditions affect the occurrence of OBDII code B051C in a 2018 GMC Sierra?

Extreme weather conditions may impact the performance of the left side assist step position sensor circuit, potentially leading to faults triggering the B051C code. Ensuring proper maintenance and protection can help prevent weather-related issues.

Q: 9. Are there any preventive measures to avoid OBDII code B051C in a 2018 GMC Sierra?

Regular inspection and maintenance of the left side assist step system, including checking wiring integrity and sensor functionality, can help identify and address potential issues before they trigger the B051C fault code.

Q: 10. Can I fix OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit in a 2018 GMC Sierra myself?

Depending on your automotive repair skills and access to tools, you may be able to address the issue yourself by following diagnostic procedures, replacing faulty components, and resetting the fault code. However, professional assistance is recommended if you are uncertain about the repair process.

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: B051C 2018 GMC Sierra indicates Left Side Assist Step Position Sensor 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 360

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 B051C 2018 GMC Sierra 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 B051C 2018 GMC Sierra - Left Side Assist Step Position Sensor Circuit - AutoCodes.com — B051C 2018 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B051C 2018 GMC Sierra?

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 B051C 2018 GMC Sierra?

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

B051C:01 Left Side Assist Step Position Sensor Circuit Short to Battery
B051C:02 Left Side Assist Step Position Sensor Circuit Short to Ground
B051C:22 Left Side Assist Step Position Sensor Circuit Low Time < Minimum
B051C:29 Left Side Assist Step Position Sensor Circuit Too Few Pulses
B051C:2A Left Side Assist Step Position Sensor Circuit Too Many Pulses
B051C:62 Left Side Assist Step Position Sensor Circuit Actuator Stuck Open
B051C:63 Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B051C 2018 GMC Sierra 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 B051C 2018 GMC Sierra code?

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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 B051C 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B051C in a 2018 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

The common symptoms include the left side assist step not deploying or retracting properly, warning lights on the dashboard, and potential issues with the assist step's functionality.

2. What are the possible causes of OBDII code B051C in a 2018 GMC Sierra?

The code B051C typically indicates a fault with the left side assist step position sensor circuit, which could be caused by wiring issues, a faulty sensor, or a malfunction in the control module.

3. How can I diagnose the OBDII code B051C in a 2018 GMC Sierra?

Diagnosing the code involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors related to the left side assist step position sensor circuit, and testing the sensor for proper functionality.

4. What are some repair tips for fixing OBDII code B051C in a 2018 GMC Sierra?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the left side assist step position sensor if necessary, and resetting the fault code using an OBDII scanner after the repairs are completed.

5. Can I drive my 2018 GMC Sierra with OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit?

It is generally recommended to address the issue promptly to ensure the proper functioning of the left side assist step. Driving with this code may result in the assist step not working correctly when needed.

6. Is it possible to reset OBDII code B051C in a 2018 GMC Sierra without repairing the issue?

While you can clear the fault code using an OBDII scanner, it is crucial to address the underlying problem causing the code to prevent future issues with the left side assist step position sensor circuit.

7. How much does it cost to repair OBDII code B051C in a 2018 GMC Sierra at a dealership or a repair shop?

The cost of repair can vary depending on the specific cause of the issue, but it may involve diagnostic fees, parts replacement costs, and labor charges. It is advisable to obtain quotes from different service providers.

8. Can extreme weather conditions affect the occurrence of OBDII code B051C in a 2018 GMC Sierra?

Extreme weather conditions may impact the performance of the left side assist step position sensor circuit, potentially leading to faults triggering the B051C code. Ensuring proper maintenance and protection can help prevent weather-related issues.

9. Are there any preventive measures to avoid OBDII code B051C in a 2018 GMC Sierra?

Regular inspection and maintenance of the left side assist step system, including checking wiring integrity and sensor functionality, can help identify and address potential issues before they trigger the B051C fault code.

10. Can I fix OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit in a 2018 GMC Sierra myself?

Depending on your automotive repair skills and access to tools, you may be able to address the issue yourself by following diagnostic procedures, replacing faulty components, and resetting the fault code. However, professional assistance is recommended if you are uncertain about the repair process.