AutoCodes – Generic – B051D:22

B051D:22 Code - Right Side Assist Step Position Sensor Circuit Too Short Low Time

Q: 1. What does the OBDII code B051D:22 mean?

This code indicates a problem with the right side assist step position sensor circuit, specifically that the circuit time is too short or the voltage is too low.

Q: 2. What are the common symptoms of the B051D:22 code?

Symptoms may include the right side assist step not deploying or retracting properly, intermittent operation, or a warning message on the dashboard.

Q: 3. What causes the B051D:22 code to appear?

Common causes include a faulty position sensor, damaged wiring or connectors, corrosion in the circuit, or a malfunctioning control module.

Q: 4. Can I still drive my vehicle with the B051D:22 code?

Yes, you can still drive the vehicle, but the right side assist step may not function correctly, which could be inconvenient or unsafe for passengers.

Q: 5. How do I diagnose the B051D:22 code?

Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to test the voltage and continuity of the position sensor circuit.

Q: 6. How do I fix the B051D:22 code?

Repairs may include replacing the right side assist step position sensor, repairing or replacing damaged wires, cleaning corroded connections, or reprogramming the control module if needed.

Q: 7. What tools are needed to troubleshoot the B051D:22 code?

You'll typically need a diagnostic scan tool, multimeter, and basic hand tools to inspect and test the assist step circuit.

Q: 8. How much does it cost to repair the B051D:22 code?

Repair costs can range from $50 to $300, depending on whether you need to replace the position sensor, repair wiring, or address other issues.

Q: 9. Can a blown fuse cause the B051D:22 code?

While unlikely, a blown fuse related to the assist step system could potentially cause circuit issues and should be checked during diagnosis.

Q: 10. Do I need to reprogram the control module after fixing the B051D:22 code?

Reprogramming is usually not required, but some vehicles may need a recalibration of the assist step system after repairs. Check your vehicle's service manual for specific instructions.

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:22 indicates Right Side Assist Step Position Sensor Circuit Too Short Low Time.
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 246

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:22 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. The Diagnostic Trouble Code (DTC) will be set when the hall sensor signal is noisy.

OBDII Code B051D:22 - Right Side Assist Step Position Sensor Circuit Too Short Low Time - AutoCodes.com — B051D:22 Code - Right Side Assist Step Position Sensor Circuit Too Short Low Time

What does this mean?

What are the Possible Causes of the DTC B051D:22?

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:22?

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:22 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:22 Code

1. What does the OBDII code B051D:22 mean?

This code indicates a problem with the right side assist step position sensor circuit, specifically that the circuit time is too short or the voltage is too low.

2. What are the common symptoms of the B051D:22 code?

Symptoms may include the right side assist step not deploying or retracting properly, intermittent operation, or a warning message on the dashboard.

3. What causes the B051D:22 code to appear?

Common causes include a faulty position sensor, damaged wiring or connectors, corrosion in the circuit, or a malfunctioning control module.

4. Can I still drive my vehicle with the B051D:22 code?

Yes, you can still drive the vehicle, but the right side assist step may not function correctly, which could be inconvenient or unsafe for passengers.

5. How do I diagnose the B051D:22 code?

Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to test the voltage and continuity of the position sensor circuit.

6. How do I fix the B051D:22 code?

Repairs may include replacing the right side assist step position sensor, repairing or replacing damaged wires, cleaning corroded connections, or reprogramming the control module if needed.

7. What tools are needed to troubleshoot the B051D:22 code?

You'll typically need a diagnostic scan tool, multimeter, and basic hand tools to inspect and test the assist step circuit.

8. How much does it cost to repair the B051D:22 code?

Repair costs can range from $50 to $300, depending on whether you need to replace the position sensor, repair wiring, or address other issues.

9. Can a blown fuse cause the B051D:22 code?

While unlikely, a blown fuse related to the assist step system could potentially cause circuit issues and should be checked during diagnosis.

10. Do I need to reprogram the control module after fixing the B051D:22 code?

Reprogramming is usually not required, but some vehicles may need a recalibration of the assist step system after repairs. Check your vehicle's service manual for specific instructions.