AutoCodesGeneric – B051D:29

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

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:29 indicates Right Side Assist Step Position Sensor Circuit Too Few Pulses.
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 403
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 13, 2022
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Code B051D:29 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 no hall sensor counts are detected while the motor is active.
OBDII Code B051D:29 - Right Side Assist Step Position Sensor Circuit Too Few Pulses - AutoCodes.com
B051D:29 Code - Right Side Assist Step Position Sensor Circuit Too Few Pulses

What are the Possible Causes of the DTC B051D:29?

  • 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:29?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B051D:29 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:29 Code

1. What does the OBDII code B051D:29 mean?

This code indicates that the Right Side Assist Step Position Sensor is detecting too few pulses, which may signal an issue with the sensor or its circuit.

2. What are common symptoms of a B051D:29 code?

Symptoms may include the right-side assist step not deploying or retracting properly, unusual noises from the step mechanism, or a warning light on the dashboard.

3. What causes the B051D:29 code to appear?

Common causes include a faulty position sensor, damaged wiring or connectors, debris obstructing the assist step mechanism, or issues with the step motor.

4. Can I still drive my vehicle with a B051D:29 code?

Yes, you can drive the vehicle, but the assist step may not function correctly, which could be inconvenient or unsafe for passengers relying on it.

5. How do I diagnose the cause of a B051D:29 code?

Start by inspecting the wiring and connectors for damage, testing the position sensor with a multimeter, and checking the step mechanism for obstructions or mechanical failure.

6. How can I fix the B051D:29 code?

Repairs may include replacing the faulty position sensor, repairing or replacing damaged wiring, cleaning the assist step mechanism, or recalibrating the system.

7. How much does it cost to fix a B051D:29 code?

Costs can vary depending on the issue, with sensor replacement typically costing $100–$300 and wiring repairs or recalibration adding to the expense.

8. Can I fix the B051D:29 code myself?

Yes, if you have basic electrical and mechanical knowledge, you can inspect and replace components like the sensor or wiring. However, complex issues may require professional help.

9. How can I prevent the B051D:29 code from recurring?

Regularly clean and maintain the assist step mechanism, inspect the wiring for wear, and avoid excessive exposure to dirt or moisture.

10. Will clearing the B051D:29 code with a scan tool fix the issue?

Clearing the code will reset the warning, but the underlying issue must be addressed to prevent the code from reappearing.

Discuss the causes and fixes for B051D:29 OBDII Code

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