Engine-CodesGMC – B051D 2018 GMC Sierra

B051D 2018 GMC Sierra Code - Right Side Assist Step Position Sensor Circuit

Quick Answer

The B051D diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Right Side Assist Step Position Sensor Circuit. Common causes include Faulty assist step position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting sensor performance. 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
B051D 2018 GMC Sierra indicates Right Side Assist Step Position Sensor Circuit.
Common causes
Common causes include Faulty assist step position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting sensor performance.
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.
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B051D 2018 GMC Sierra Description

The B051D diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Right Side Assist Step Position Sensor Circuit. This code indicates that there is a malfunction in the circuit responsible for monitoring the position of the right side assist step on the vehicle. The assist step position sensor is a component that helps control the deployment and retraction of the assist step, ensuring it operates smoothly and safely.

OBDII Code B051D 2018 GMC Sierra - Right Side Assist Step Position Sensor Circuit
B051D 2018 GMC Sierra Code - Right Side Assist Step Position Sensor Circuit

Common Causes of B051D 2018 GMC Sierra

  1. Faulty assist step position sensor.
  2. Damaged wiring or connectors in the sensor circuit.
  3. Corrosion or debris affecting sensor performance.
  4. Issues with the control module responsible for the assist step.
  5. Electrical problems such as a blown fuse or relay related to the circuit.

Symptoms of B051D 2018 GMC Sierra

  1. Assist step fails to deploy or retract.
  2. Warning light on the dashboard indicating an issue with the assist step.
  3. Unusual noises coming from the assist step mechanism.
  4. Inconsistent operation of the assist step.

How to Fix B051D 2018 GMC Sierra

  1. Begin by conducting a thorough inspection of the assist step position sensor and its wiring for any visible damage or corrosion.
  2. Use a multimeter to test the sensor's resistance and voltage output to determine if it is functioning correctly.
  3. Check the control module for any signs of malfunction and ensure it is receiving proper signals from the sensor.
  4. Replace the assist step position sensor if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the DTC from the vehicle's computer system and test the assist step to verify proper operation.

Cost to Fix B051D 2018 GMC Sierra

The cost of repairing the Right Side Assist Step Position Sensor Circuit can vary depending on the specific issue and the labor rates in your area. Generally, the parts required for this repair, such as a new sensor or control module, can range from $100 to $300. Labor costs typically add an additional $100 to $200, bringing the total repair cost to approximately $200 to $500. It's important to note that these are rough estimates, and actual costs may differ based on the extent of the damage and the rates charged by auto repair shops in your location. Be sure to obtain a detailed quote from a qualified technician before proceeding with the repair.

Tech Notes for B051D 2018 GMC Sierra

B051D:01 Right Side Assist Step Position Sensor Circuit Short to Battery

B051D:02 Right Side Assist Step Position Sensor Circuit Short to Ground

B051D:22 Right Side Assist Step Position Sensor Circuit Low Time < Minimum

B051D:29 Right Side Assist Step Position Sensor Circuit Too Few Pulses

B051D:2A Right Side Assist Step Position Sensor Circuit Too Many Pulses

B051D:62 Right Side Assist Step Position Sensor Circuit Actuator Stuck Open

B051D:63 Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed

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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 B051D 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B051D on a 2018 GMC Sierra related to the Right Side Assist Step Position Sensor Circuit?

The common symptoms include the right-side assist step not deploying or retracting properly, or the vehicle displaying a warning light indicating an issue with the assist step system.

2. What could cause the OBDII code B051D to trigger on a 2018 GMC Sierra?

Potential causes of this code include a faulty right 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 causing OBDII code B051D on my 2018 GMC Sierra?

Diagnosing this code typically involves a visual inspection of the assist step components, checking the wiring and connectors for damage, and using a diagnostic scanner to read the specific error codes stored in the system.

4. Can I still drive my 2018 GMC Sierra with OBDII code B051D active?

While the vehicle may still be operable with this code present, it is recommended to address the issue promptly to ensure the proper functioning of the right side assist step system.

5. What are some repair tips for fixing OBDII code B051D on a 2018 GMC Sierra?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the right side assist step position sensor if necessary, or resetting the system after making repairs.

6. Is it safe to attempt DIY repairs for OBDII code B051D on a 2018 GMC Sierra?

If you have the necessary tools and knowledge, some DIY repairs like checking and repairing wiring connections can be safely attempted. However, more complex issues may require professional assistance.

7. How can I reset the OBDII code B051D on my 2018 GMC Sierra after making repairs?

After addressing the underlying issue causing the code, you can reset the OBDII code using a diagnostic scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

8. Are there any recalls or technical service bulletins related to OBDII code B051D on the 2018 GMC Sierra?

It's recommended to check with a GMC dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to this specific OBDII code for your vehicle.

9. How much does it typically cost to repair OBDII code B051D on a 2018 GMC Sierra at a dealership or repair shop?

The cost of repairing this code can vary depending on the underlying issue, parts needed, and labor rates. It's advisable to get a diagnostic inspection and repair estimate from a trusted dealership or repair shop.

10. What long-term effects can OBDII code B051D have on the 2018 GMC Sierra if left unresolved?

Leaving this code unresolved could potentially lead to further damage to the right side assist step system, affecting its functionality and safety. It's best to address the issue promptly to avoid any long-term complications.

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