AutoCodes – Generic – B051C

B051C Code - Left Side Assist Step Position Sensor Circuit

Q: 1. What are the common symptoms of OBDII code B051C (Left Side Assist Step Position Sensor Circuit)?

- The common symptoms include malfunctioning or erratic operation of the left side assist step, warning lights on the dashboard, and potential issues with the step retracting or extending properly.

Q: 2. What are the possible causes of OBDII code B051C?

- The code B051C can be triggered by a faulty left side assist step position sensor, damaged wiring or connectors in the sensor circuit, or issues with the assist step motor.

Q: 3. How can I diagnose the source of OBDII code B051C?

- A diagnostic scan tool can help pinpoint the exact cause of the code by reading the sensor data and identifying any abnormalities in the left side assist step system.

Q: 4. Can I still drive my vehicle with OBDII code B051C present?

- 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 left side assist step.

Q: 5. How can I repair OBDII code B051C?

- Repairing this code may involve replacing the left side assist step position sensor, repairing damaged wiring or connectors, or addressing any issues with the assist step motor.

Q: 6. Are there any DIY tips for fixing OBDII code B051C?

- DIY enthusiasts with automotive experience may attempt to inspect the sensor circuit, wiring, and connectors for any visible damage before considering sensor replacement or seeking professional help.

Q: 7. How much does it typically cost to repair OBDII code B051C?

- The cost of repairing this code can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is advisable to consult a mechanic for an accurate estimate.

Q: 8. Can OBDII code B051C be intermittent?

- Yes, this code can sometimes be intermittent, meaning the issue may come and go. It is important to address it even if it temporarily disappears to prevent potential safety hazards.

Q: 9. What happens if OBDII code B051C is ignored?

- Ignoring this code can lead to continued malfunctioning of the left side assist step, potential safety risks, and further damage to the assist step system if the root cause is not resolved.

Q: 10. How can I prevent OBDII code B051C from recurring?

- Regularly inspecting and maintaining the left side assist step system, ensuring proper wiring connections, and addressing any underlying issues promptly can help prevent the recurrence of this code.

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 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 2,678

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

What does this mean?

What are the Possible Causes of the DTC B051C?

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?

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 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 code?

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Need Help with the Code?

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Information for Specific Makes

B051C Buick — Left Side Assist Step Position Sensor Circuit
B051C Cadillac — Left Side Assist Step Position Sensor Circuit
B051C Chevrolet — Left Side Assist Step Position Sensor Circuit
B051C GMC — Left Side Assist Step Position Sensor Circuit

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 Code

1. What are the common symptoms of OBDII code B051C (Left Side Assist Step Position Sensor Circuit)?

- The common symptoms include malfunctioning or erratic operation of the left side assist step, warning lights on the dashboard, and potential issues with the step retracting or extending properly.

2. What are the possible causes of OBDII code B051C?

- The code B051C can be triggered by a faulty left side assist step position sensor, damaged wiring or connectors in the sensor circuit, or issues with the assist step motor.

3. How can I diagnose the source of OBDII code B051C?

- A diagnostic scan tool can help pinpoint the exact cause of the code by reading the sensor data and identifying any abnormalities in the left side assist step system.

4. Can I still drive my vehicle with OBDII code B051C present?

- 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 left side assist step.

5. How can I repair OBDII code B051C?

- Repairing this code may involve replacing the left side assist step position sensor, repairing damaged wiring or connectors, or addressing any issues with the assist step motor.

6. Are there any DIY tips for fixing OBDII code B051C?

- DIY enthusiasts with automotive experience may attempt to inspect the sensor circuit, wiring, and connectors for any visible damage before considering sensor replacement or seeking professional help.

7. How much does it typically cost to repair OBDII code B051C?

- The cost of repairing this code can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is advisable to consult a mechanic for an accurate estimate.

8. Can OBDII code B051C be intermittent?

- Yes, this code can sometimes be intermittent, meaning the issue may come and go. It is important to address it even if it temporarily disappears to prevent potential safety hazards.

9. What happens if OBDII code B051C is ignored?

- Ignoring this code can lead to continued malfunctioning of the left side assist step, potential safety risks, and further damage to the assist step system if the root cause is not resolved.

10. How can I prevent OBDII code B051C from recurring?

- Regularly inspecting and maintaining the left side assist step system, ensuring proper wiring connections, and addressing any underlying issues promptly can help prevent the recurrence of this code.