AutoCodes – Generic – B051D:01

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

Q: 1. What does the OBDII code B051D:01 mean?

The B051D:01 code indicates a short to battery in the right side assist step position sensor circuit, which monitors the position of the retractable side step.

Q: 2. What are the common symptoms of code B051D:01?

Symptoms include the right side assist step not extending or retracting properly, warning lights on the dashboard, or audible chimes indicating a malfunction.

Q: 3. What causes the B051D:01 code to appear?

This code is typically caused by a short to battery in the wiring, a faulty position sensor, a damaged assist step motor, or corrosion in the electrical connectors.

Q: 4. Can I drive my vehicle with the B051D:01 code active?

Yes, you can drive the vehicle, but the right side assist step may not function properly, which could be inconvenient or pose a safety risk when entering or exiting the vehicle.

Q: 5. How do I diagnose the cause of code B051D:01?

Start by visually inspecting the wiring and connectors for damage or corrosion, followed by testing the position sensor and motor with a multimeter to check for shorts or irregularities.

Q: 6. How can I fix the B051D:01 code?

Repairs may involve replacing damaged wiring, cleaning corroded connectors, or replacing the faulty position sensor or assist step motor.

Q: 7. Is the B051D:01 code specific to certain vehicle models?

This code is most common on vehicles equipped with retractable side steps, typically larger trucks and SUVs.

Q: 8. What tools are needed to troubleshoot the B051D:01 code?

You'll need a diagnostic scanner to read the code, a multimeter to test electrical components, and basic hand tools for repairs.

Q: 9. Can a faulty assist step motor trigger the B051D:01 code?

Yes, a damaged assist step motor or its internal components can create a short circuit, leading to the code.

Q: 10. What should I do if the B051D:01 code reappears after repairs?

Reinspect all wiring, connectors, and components for missed issues, ensure proper installation, and check for any related codes that could indicate a broader electrical problem.

Quick Answer

The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Common causes include Faulty Right Side Assist Step Motor, Right Side Assist Step Motor harness is open or shorted, Right 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: B051D:01 indicates Right Side Assist Step Position Sensor Circuit Short to Battery.
Common causes: Common causes include Faulty Right Side Assist Step Motor, Right Side Assist Step Motor harness is open or shorted, Right 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 227

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 B051D:01 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 B051D:01 - Right Side Assist Step Position Sensor Circuit Short to Battery - AutoCodes.com — B051D:01 Code - Right Side Assist Step Position Sensor Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC B051D:01?

Faulty Right Side Assist Step Motor
Right Side Assist Step Motor harness is open or shorted
Right Side Assist Step Motor circuit poor electrical connection
Faulty Assist Step Control (ASC) Module

How to Fix the DTC B051D:01?

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

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B051D:01 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.

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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:01 Code

1. What does the OBDII code B051D:01 mean?

The B051D:01 code indicates a short to battery in the right side assist step position sensor circuit, which monitors the position of the retractable side step.

2. What are the common symptoms of code B051D:01?

Symptoms include the right side assist step not extending or retracting properly, warning lights on the dashboard, or audible chimes indicating a malfunction.

3. What causes the B051D:01 code to appear?

This code is typically caused by a short to battery in the wiring, a faulty position sensor, a damaged assist step motor, or corrosion in the electrical connectors.

4. Can I drive my vehicle with the B051D:01 code active?

Yes, you can drive the vehicle, but the right side assist step may not function properly, which could be inconvenient or pose a safety risk when entering or exiting the vehicle.

5. How do I diagnose the cause of code B051D:01?

Start by visually inspecting the wiring and connectors for damage or corrosion, followed by testing the position sensor and motor with a multimeter to check for shorts or irregularities.

6. How can I fix the B051D:01 code?

Repairs may involve replacing damaged wiring, cleaning corroded connectors, or replacing the faulty position sensor or assist step motor.

7. Is the B051D:01 code specific to certain vehicle models?

This code is most common on vehicles equipped with retractable side steps, typically larger trucks and SUVs.

8. What tools are needed to troubleshoot the B051D:01 code?

You'll need a diagnostic scanner to read the code, a multimeter to test electrical components, and basic hand tools for repairs.

9. Can a faulty assist step motor trigger the B051D:01 code?

Yes, a damaged assist step motor or its internal components can create a short circuit, leading to the code.

10. What should I do if the B051D:01 code reappears after repairs?

Reinspect all wiring, connectors, and components for missed issues, ensure proper installation, and check for any related codes that could indicate a broader electrical problem.