AutoCodes – GMC – B051C 2015 GMC Sierra

B051C 2015 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

Q: 1. What are the common symptoms of OBDII code B051C in a 2015 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- Common symptoms include malfunctioning or inoperative left side assist steps, warning lights on the dashboard, and potentially triggering the check engine light.

Q: 2. What could cause the OBDII code B051C in a 2015 GMC Sierra?

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

Q: 3. How can I diagnose the issue related to the Left Side Assist Step Position Sensor Circuit on my 2015 GMC Sierra?

- To diagnose the issue, you can use an OBDII scanner to read the specific code, visually inspect the wiring and sensor components, and perform electrical tests to pinpoint the fault in the circuit.

Q: 4. Is it safe to drive my 2015 GMC Sierra with the OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the assist steps and related safety features.

Q: 5. Can I repair the Left Side Assist Step Position Sensor Circuit issue in my 2015 GMC Sierra myself?

- Depending on your experience and tools, you may be able to repair the issue yourself by replacing the faulty sensor, repairing wiring connections, or resetting the control module. However, professional assistance may be necessary for complex repairs.

Q: 6. How much does it typically cost to repair the OBDII code B051C in a 2015 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for simple fixes like sensor replacement to over a thousand dollars for more extensive repairs involving control module replacement.

Q: 7. Will resetting the OBDII code B051C in my 2015 GMC Sierra make the issue go away permanently?

- Resetting the code may temporarily clear the warning lights, but if the underlying issue in the Left Side Assist Step Position Sensor Circuit is not addressed, the code is likely to reappear once the system detects the fault again.

Q: 8. Are there any preventive measures I can take to avoid encountering the OBDII code B051C in my 2015 GMC Sierra in the future?

- Regularly inspecting the assist step components, ensuring proper wiring connections, and addressing any issues promptly can help prevent the recurrence of the code B051C related to the Left Side Assist Step Position Sensor Circuit.

Q: 9. Can the OBDII code B051C in a 2015 GMC Sierra affect the overall performance of the vehicle?

- While the code itself may not directly impact the performance of the vehicle, it can affect the functionality of the left side assist steps and related safety features, so it is important to address the issue to maintain the vehicle's overall functionality.

Q: 10. How long does it typically take to repair the issue causing the OBDII code B051C in a 2015 GMC Sierra?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. Simple fixes like sensor replacement may take a few hours, while more involved repairs could take a day or more to complete.

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 2015 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 215

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 2015 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 2015 GMC Sierra - Left Side Assist Step Position Sensor Circuit - AutoCodes.com — B051C 2015 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B051C 2015 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 2015 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 2015 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 2015 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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B051C in a 2015 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- Common symptoms include malfunctioning or inoperative left side assist steps, warning lights on the dashboard, and potentially triggering the check engine light.

2. What could cause the OBDII code B051C in a 2015 GMC Sierra?

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

3. How can I diagnose the issue related to the Left Side Assist Step Position Sensor Circuit on my 2015 GMC Sierra?

- To diagnose the issue, you can use an OBDII scanner to read the specific code, visually inspect the wiring and sensor components, and perform electrical tests to pinpoint the fault in the circuit.

4. Is it safe to drive my 2015 GMC Sierra with the OBDII code B051C related to the Left Side Assist Step Position Sensor Circuit?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the assist steps and related safety features.

5. Can I repair the Left Side Assist Step Position Sensor Circuit issue in my 2015 GMC Sierra myself?

- Depending on your experience and tools, you may be able to repair the issue yourself by replacing the faulty sensor, repairing wiring connections, or resetting the control module. However, professional assistance may be necessary for complex repairs.

6. How much does it typically cost to repair the OBDII code B051C in a 2015 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for simple fixes like sensor replacement to over a thousand dollars for more extensive repairs involving control module replacement.

7. Will resetting the OBDII code B051C in my 2015 GMC Sierra make the issue go away permanently?

- Resetting the code may temporarily clear the warning lights, but if the underlying issue in the Left Side Assist Step Position Sensor Circuit is not addressed, the code is likely to reappear once the system detects the fault again.

8. Are there any preventive measures I can take to avoid encountering the OBDII code B051C in my 2015 GMC Sierra in the future?

- Regularly inspecting the assist step components, ensuring proper wiring connections, and addressing any issues promptly can help prevent the recurrence of the code B051C related to the Left Side Assist Step Position Sensor Circuit.

9. Can the OBDII code B051C in a 2015 GMC Sierra affect the overall performance of the vehicle?

- While the code itself may not directly impact the performance of the vehicle, it can affect the functionality of the left side assist steps and related safety features, so it is important to address the issue to maintain the vehicle's overall functionality.

10. How long does it typically take to repair the issue causing the OBDII code B051C in a 2015 GMC Sierra?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. Simple fixes like sensor replacement may take a few hours, while more involved repairs could take a day or more to complete.