AutoCodes – Generic – B051D:02

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

Q: What does the OBDII code B051D:02 mean?

The code indicates a short to ground in the Right Side Assist Step Position Sensor Circuit, which monitors the position of the assist step.

Q: What are the common symptoms of the B051D:02 code?

Symptoms may include the assist step not deploying or retracting, a warning light on the dash, or erratic operation of the step.

Q: What causes the B051D:02 code to appear?

Common causes include damaged wiring, a faulty position sensor, corrosion in the circuit, or a short to ground.

Q: How can I diagnose the B051D:02 code?

Inspect the wiring and connectors for damage or corrosion, test the position sensor with a multimeter, and check for continuity to ground in the circuit.

Q: Can the B051D:02 code damage the assist step system?

If ignored, the code may prevent the assist step from operating properly, potentially leading to mechanical wear or failure over time.

Q: How do you fix the B051D:02 code?

Repairs typically involve replacing damaged wiring, cleaning corroded connections, or replacing the faulty position sensor.

Q: Is it safe to drive with the B051D:02 code?

Yes, but the assist step may not function correctly, which could inconvenience passengers entering or exiting the vehicle.

Q: How much does it cost to repair the B051D:02 code?

Repair costs vary but typically range from $50 to $150 for wiring repairs, while a sensor replacement could cost $100 to $300 depending on the vehicle.

Q: Can the B051D:02 code clear itself?

No, the code usually requires repairs to the circuit or sensor and then clearing with an OBDII scanner.

Q: What tools are needed to fix the B051D:02 code?

You may need a multimeter, an OBDII scanner, basic hand tools, and electrical repair supplies such as wiring and connectors.

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:02 indicates Right Side Assist Step Position Sensor Circuit Short to Ground.
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 204

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:02 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:02 - Right Side Assist Step Position Sensor Circuit Short to Ground - AutoCodes.com — B051D:02 Code - Right Side Assist Step Position Sensor Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B051D:02?

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:02?

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:02 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:02 Code

What does the OBDII code B051D:02 mean?

The code indicates a short to ground in the Right Side Assist Step Position Sensor Circuit, which monitors the position of the assist step.

What are the common symptoms of the B051D:02 code?

Symptoms may include the assist step not deploying or retracting, a warning light on the dash, or erratic operation of the step.

What causes the B051D:02 code to appear?

Common causes include damaged wiring, a faulty position sensor, corrosion in the circuit, or a short to ground.

How can I diagnose the B051D:02 code?

Inspect the wiring and connectors for damage or corrosion, test the position sensor with a multimeter, and check for continuity to ground in the circuit.

Can the B051D:02 code damage the assist step system?

If ignored, the code may prevent the assist step from operating properly, potentially leading to mechanical wear or failure over time.

How do you fix the B051D:02 code?

Repairs typically involve replacing damaged wiring, cleaning corroded connections, or replacing the faulty position sensor.

Is it safe to drive with the B051D:02 code?

Yes, but the assist step may not function correctly, which could inconvenience passengers entering or exiting the vehicle.

How much does it cost to repair the B051D:02 code?

Repair costs vary but typically range from $50 to $150 for wiring repairs, while a sensor replacement could cost $100 to $300 depending on the vehicle.

Can the B051D:02 code clear itself?

No, the code usually requires repairs to the circuit or sensor and then clearing with an OBDII scanner.

What tools are needed to fix the B051D:02 code?

You may need a multimeter, an OBDII scanner, basic hand tools, and electrical repair supplies such as wiring and connectors.

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