AutoCodes – Generic – B051C:29

B051C:29 Code - Left Side Assist Step Position Sensor Circuit Too Few Pulses

Q: 1. What does the OBDII code B051C:29 mean?

This code indicates an issue with the left side assist step position sensor circuit, specifically that it is receiving too few pulses, which may affect the operation of the deployable assist step.

Q: 2. What are the common symptoms of code B051C:29?

Symptoms include the left side assist step not deploying or retracting correctly, being stuck in one position, or operating intermittently.

Q: 3. What causes the B051C:29 code to appear?

Common causes include a faulty position sensor, damaged wiring or connectors, dirt or debris obstructing the assist step mechanism, or a malfunction in the control module.

Q: 4. Can I still drive my vehicle with the B051C:29 code?

Yes, you can still drive the vehicle, but the left side assist step may not function properly, potentially making it harder to enter or exit the vehicle.

Q: 5. How can I diagnose the B051C:29 code?

Start by inspecting the assist step for physical obstructions or damage, checking the wiring and connectors for corrosion or breaks, and using a scan tool to monitor the position sensor signal.

Q: 6. What tools are needed to fix the B051C:29 code?

Basic tools include a scan tool to read and clear codes, a multimeter to test electrical circuits, and possibly hand tools to remove and inspect the assist step or sensor.

Q: 7. How is the B051C:29 code typically fixed?

Repairs may involve cleaning or lubricating the assist step mechanism, repairing or replacing damaged wiring, or replacing the faulty position sensor.

Q: 8. Can a software issue cause the B051C:29 code?

While less common, a software glitch in the control module could potentially cause this code and may require a module reflash or update by the manufacturer.

Q: 9. How much does it cost to repair a B051C:29 code?

Repair costs vary widely depending on the cause but typically range from $100 for basic wiring repairs to $500 or more if the sensor or assist step mechanism needs replacement.

Q: 10. How can I prevent the B051C:29 code from occurring?

Regularly clean and inspect the assist step mechanism to prevent dirt buildup, and ensure all wiring and connectors are secure and free of corrosion.

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:29 indicates Left Side Assist Step Position Sensor Circuit Too Few Pulses.
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 163

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: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 B051C:29 - Left Side Assist Step Position Sensor Circuit Too Few Pulses - AutoCodes.com — B051C:29 Code - Left Side Assist Step Position Sensor Circuit Too Few Pulses

What does this mean?

What are the Possible Causes of the DTC B051C:29?

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: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.

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: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 B051C:29 Code

1. What does the OBDII code B051C:29 mean?

This code indicates an issue with the left side assist step position sensor circuit, specifically that it is receiving too few pulses, which may affect the operation of the deployable assist step.

2. What are the common symptoms of code B051C:29?

Symptoms include the left side assist step not deploying or retracting correctly, being stuck in one position, or operating intermittently.

3. What causes the B051C:29 code to appear?

Common causes include a faulty position sensor, damaged wiring or connectors, dirt or debris obstructing the assist step mechanism, or a malfunction in the control module.

4. Can I still drive my vehicle with the B051C:29 code?

Yes, you can still drive the vehicle, but the left side assist step may not function properly, potentially making it harder to enter or exit the vehicle.

5. How can I diagnose the B051C:29 code?

Start by inspecting the assist step for physical obstructions or damage, checking the wiring and connectors for corrosion or breaks, and using a scan tool to monitor the position sensor signal.

6. What tools are needed to fix the B051C:29 code?

Basic tools include a scan tool to read and clear codes, a multimeter to test electrical circuits, and possibly hand tools to remove and inspect the assist step or sensor.

7. How is the B051C:29 code typically fixed?

Repairs may involve cleaning or lubricating the assist step mechanism, repairing or replacing damaged wiring, or replacing the faulty position sensor.

8. Can a software issue cause the B051C:29 code?

While less common, a software glitch in the control module could potentially cause this code and may require a module reflash or update by the manufacturer.

9. How much does it cost to repair a B051C:29 code?

Repair costs vary widely depending on the cause but typically range from $100 for basic wiring repairs to $500 or more if the sensor or assist step mechanism needs replacement.

10. How can I prevent the B051C:29 code from occurring?

Regularly clean and inspect the assist step mechanism to prevent dirt buildup, and ensure all wiring and connectors are secure and free of corrosion.