AutoCodes – GMC – B051C 2017 GMC Sierra

B051C 2017 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

Q: 1. What are the common symptoms of OBDII code B051C in a 2017 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- The common symptoms include an inoperative left side assist step, an illuminated warning light on the dashboard, and possibly a message indicating a fault with the assist step system.

Q: 2. What are the possible causes of OBDII code B051C in a 2017 GMC Sierra?

- The code B051C in a 2017 GMC Sierra is typically caused by a faulty left side assist step position sensor, damaged wiring or connectors in the circuit, or a malfunction in the assist step control module.

Q: 3. How can I diagnose the issue related to OBDII code B051C in my 2017 GMC Sierra?

- Diagnosing the issue involves using a diagnostic scanner to retrieve the trouble code, inspecting the left side assist step position sensor and its wiring for any visible damage, and testing the sensor's functionality using a multimeter.

Q: 4. Can I still drive my 2017 GMC Sierra with OBDII code B051C present?

- While it may be possible to drive the vehicle with the code present, it is recommended to address the issue promptly to ensure the proper functioning of the left side assist step and to prevent any safety concerns.

Q: 5. How can I repair OBDII code B051C in my 2017 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- Repairing the code B051C may involve replacing the faulty left side assist step position sensor, repairing any damaged wiring or connectors, or reprogramming the assist step control module if necessary.

Q: 6. Are there any common mistakes to avoid when repairing OBDII code B051C in a 2017 GMC Sierra?

- Common mistakes to avoid include overlooking simple wiring issues, failing to properly secure connectors after repair, and neglecting to clear the trouble code after completing the repairs.

Q: 7. Is it possible to reset the OBDII code B051C in a 2017 GMC Sierra without fixing the underlying issue?

- While it is possible to clear the trouble code temporarily, it will likely reappear if the root cause of the issue, such as a faulty sensor or wiring problem, is not addressed.

Q: 8. Can extreme weather conditions affect the operation of the left side assist step position sensor in a 2017 GMC Sierra?

- Yes, extreme weather conditions such as excessive moisture or freezing temperatures can potentially impact the operation of the sensor and trigger the OBDII code B051C.

Q: 9. Is it recommended to seek professional help for diagnosing and repairing OBDII code B051C in a 2017 GMC Sierra?

- If you are not experienced in diagnosing automotive electrical issues, it is advisable to seek professional help to accurately diagnose and repair the problem related to code B051C in your 2017 GMC Sierra.

Q: 10. How can I prevent OBDII code B051C from recurring in my 2017 GMC Sierra in the future?

- Regularly inspecting the left side assist step system for any signs of damage, keeping the area clean from debris, and addressing any issues promptly can help prevent the recurrence of code B051C in your 2017 GMC Sierra.

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 2017 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 265

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 2017 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 2017 GMC Sierra - Left Side Assist Step Position Sensor Circuit - AutoCodes.com — B051C 2017 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B051C 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B051C in a 2017 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- The common symptoms include an inoperative left side assist step, an illuminated warning light on the dashboard, and possibly a message indicating a fault with the assist step system.

2. What are the possible causes of OBDII code B051C in a 2017 GMC Sierra?

- The code B051C in a 2017 GMC Sierra is typically caused by a faulty left side assist step position sensor, damaged wiring or connectors in the circuit, or a malfunction in the assist step control module.

3. How can I diagnose the issue related to OBDII code B051C in my 2017 GMC Sierra?

- Diagnosing the issue involves using a diagnostic scanner to retrieve the trouble code, inspecting the left side assist step position sensor and its wiring for any visible damage, and testing the sensor's functionality using a multimeter.

4. Can I still drive my 2017 GMC Sierra with OBDII code B051C present?

- While it may be possible to drive the vehicle with the code present, it is recommended to address the issue promptly to ensure the proper functioning of the left side assist step and to prevent any safety concerns.

5. How can I repair OBDII code B051C in my 2017 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

- Repairing the code B051C may involve replacing the faulty left side assist step position sensor, repairing any damaged wiring or connectors, or reprogramming the assist step control module if necessary.

6. Are there any common mistakes to avoid when repairing OBDII code B051C in a 2017 GMC Sierra?

- Common mistakes to avoid include overlooking simple wiring issues, failing to properly secure connectors after repair, and neglecting to clear the trouble code after completing the repairs.

7. Is it possible to reset the OBDII code B051C in a 2017 GMC Sierra without fixing the underlying issue?

- While it is possible to clear the trouble code temporarily, it will likely reappear if the root cause of the issue, such as a faulty sensor or wiring problem, is not addressed.

8. Can extreme weather conditions affect the operation of the left side assist step position sensor in a 2017 GMC Sierra?

- Yes, extreme weather conditions such as excessive moisture or freezing temperatures can potentially impact the operation of the sensor and trigger the OBDII code B051C.

9. Is it recommended to seek professional help for diagnosing and repairing OBDII code B051C in a 2017 GMC Sierra?

- If you are not experienced in diagnosing automotive electrical issues, it is advisable to seek professional help to accurately diagnose and repair the problem related to code B051C in your 2017 GMC Sierra.

10. How can I prevent OBDII code B051C from recurring in my 2017 GMC Sierra in the future?

- Regularly inspecting the left side assist step system for any signs of damage, keeping the area clean from debris, and addressing any issues promptly can help prevent the recurrence of code B051C in your 2017 GMC Sierra.