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Engine-Codes – GMC – B051C 2014 GMC Sierra

B051C 2014 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

Quick Answer

The B051C diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Left Side Assist Step Position Sensor Circuit. Common causes include Faulty left side assist step position sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to the sensor or its components. 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 2014 GMC Sierra indicates Left Side Assist Step Position Sensor Circuit.
Common causes
Common causes include Faulty left side assist step position sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to the sensor or its components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B051C 2014 GMC Sierra Description

The B051C diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Left Side Assist Step Position Sensor Circuit. This code indicates that there is a malfunction in the sensor circuit responsible for monitoring the position of the left side assist step on the vehicle. The assist step is a retractable step located beneath the doors of the truck, which extends when the door is opened to assist passengers in getting in and out of the vehicle.

OBDII Code B051C 2014 GMC Sierra - Left Side Assist Step Position Sensor Circuit
B051C 2014 GMC Sierra Code - Left Side Assist Step Position Sensor Circuit

Common Causes of B051C 2014 GMC Sierra

  1. Faulty left side assist step position sensor
  2. Wiring or connector issues in the sensor circuit
  3. Corrosion or damage to the sensor or its components
  4. Electrical issues in the vehicle's wiring harness
  5. Software or programming issues in the vehicle's control module

Symptoms of B051C 2014 GMC Sierra

  1. Check engine light illuminated
  2. Left side assist step not deploying or retracting properly
  3. Unusual noises coming from the left side assist step mechanism
  4. Error message on the vehicle's information display related to the assist step

How to Fix B051C 2014 GMC Sierra

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the exact cause of the problem.
  2. Inspect the sensor and wiring: Check the left side assist step position sensor and its wiring for any visible damage, corrosion, or loose connections.
  3. Replace the sensor: If the sensor is found to be faulty, replace it with a new one following the manufacturer's guidelines.
  4. Repair wiring or connectors: If there are issues with the wiring or connectors, repair or replace them as needed to ensure proper connectivity.
  5. Clear DTC and test operation: After completing the repair, clear the DTC from the vehicle's memory and test the operation of the left side assist step to ensure that it deploys and retracts correctly.

Cost to Fix B051C 2014 GMC Sierra

The cost of repairing a Left Side Assist Step Position Sensor Circuit issue on a 2014 GMC Sierra can vary depending on the specific cause of the problem and the cost of parts and labor in your area. Typically, the cost of replacing a sensor and addressing wiring issues can range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive prices.

What does this mean?

Tech Notes for B051C 2014 GMC Sierra

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

Need more information about the B051C 2014 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 2014 GMC Sierra Code

1. What are common symptoms of OBDII code B051C in a 2014 GMC Sierra related to the Left Side Assist Step Position Sensor Circuit?

The common symptoms include malfunctioning or erratic behavior of the left side assist step, such as failing to deploy or retract properly.

2. What does the OBDII code B051C indicate in a 2014 GMC Sierra?

The code B051C indicates a problem with the Left Side Assist Step Position Sensor Circuit in a 2014 GMC Sierra.

3. What are the possible causes of OBDII code B051C in a 2014 GMC Sierra?

Possible causes of this code can include a faulty position sensor, damaged wiring or connectors, or issues with the assist step motor.

4. How can I diagnose the cause of OBDII code B051C in my 2014 GMC Sierra?

Diagnosing the issue may involve visually inspecting the wiring and connectors, testing the position sensor for proper function, and checking the assist step motor.

5. Can I repair OBDII code B051C in my 2014 GMC Sierra myself?

If you have experience with automotive electrical systems, you may be able to repair this code yourself by replacing the faulty position sensor, repairing damaged wiring, or addressing any other identified issues.

6. Is it safe to drive my 2014 GMC Sierra with OBDII code B051C active?

It is generally not recommended to drive with this code active, as it may affect the proper operation of the left side assist step, potentially leading to safety hazards or further damage.

7. How much does it typically cost to repair OBDII code B051C in a 2014 GMC Sierra at a dealership or repair shop?

The cost of repairing this code can vary depending on the specific issue, but it may involve parts and labor costs for sensor replacement, wiring repairs, or other necessary fixes.

8. Can resetting the OBDII system clear the B051C code in my 2014 GMC Sierra?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return once the problem is detected again.

9. Are there any preventative maintenance tips to avoid OBDII code B051C in a 2014 GMC Sierra?

Regularly inspecting the assist step system, keeping connectors clean and secure, and addressing any issues promptly can help prevent the occurrence of this code.

10. How urgent is it to address OBDII code B051C in my 2014 GMC Sierra?

While the urgency may vary depending on the severity of the symptoms, it is generally advisable to address this code promptly to ensure the proper functioning of the left side assist step and maintain vehicle safety.

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