B051A:0B Code - Left Side Assist Step Motor Control Circuit Current Above Threshold
Quick Answer
The B051A:0B diagnostic trouble code (DTC) indicates that there is an issue with the left side assist step motor control circuit in the vehicle. Common causes include Faulty left side assist step motor, Wiring issues in the control circuit, Corrosion or damage to electrical connectors. 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
- B051A:0B indicates Left Side Assist Step Motor Control Circuit Current Above Threshold.
- Common causes
- Common causes include Faulty left side assist step motor, Wiring issues in the control circuit, Corrosion or damage to electrical connectors.
- 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 B051A:0B Description
The B051A:0B diagnostic trouble code (DTC) indicates that there is an issue with the left side assist step motor control circuit in the vehicle. This code specifically points to the current being above the threshold set by the manufacturer. The left side assist step motor is responsible for deploying and retracting the running board or step that assists passengers in entering and exiting the vehicle. When the current in the control circuit is higher than expected, it can lead to malfunctions in the operation of the assist step motor.
Common Causes of B051A:0B
- Faulty left side assist step motor.
- Wiring issues in the control circuit.
- Corrosion or damage to electrical connectors.
- Poor ground connection for the assist step system.
- Defective control module for the assist step motor.
Symptoms of B051A:0B
- Left side assist step not deploying or retracting.
- Unusual noises coming from the left side of the vehicle when the assist step is activated.
- Warning light on the dashboard related to the assist step system.
- Difficulty entering or exiting the vehicle, especially for passengers with mobility issues.
How to Fix B051A:0B
- Begin by conducting a visual inspection of the left side assist step motor and control circuit to check for any obvious signs of damage or corrosion.
- Use a multimeter to test the current flowing through the control circuit to determine if it is indeed above the threshold specified by the manufacturer.
- Inspect the wiring harness and connectors for any breaks, fraying, or loose connections. Repair or replace any damaged components as needed.
- Test the ground connection for the assist step system to ensure it is secure and providing a proper connection.
- If the issue persists, consider replacing the left side assist step motor or the control module, depending on which component is determined to be faulty.
Cost to Fix B051A:0B
The cost of repairing a B051A:0B code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a left side assist step motor or control module can range from $200 to $500 for parts alone. Labor costs can add an additional $100 to $300, bringing the total repair cost to approximately $300 to $800. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the rates charged by the auto repair shop. It is recommended to obtain quotes from local shops to get a more accurate estimate for the repair.
Tech Notes for B051A:0B
B051A:01 Left Side Assist Step Motor Control Circuit Short to Battery
B051A:02 Left Side Assist Step Motor Control Circuit Short to Ground
B051A:04 Left Side Assist Step Motor Control Circuit Open Circuit
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Frequently Asked Questions about B051A:0B Code
1. What does the OBDII code B051A:0B mean?
The code B051A:0B indicates that the left side assist step motor control circuit has a current above the acceptable threshold, suggesting an electrical issue with the motor or its circuit.
2. What are the common symptoms of the B051A:0B code?
Symptoms may include the left side assist step not deploying or retracting properly, intermittent operation, or complete failure to respond.
3. What causes the B051A:0B code to appear?
Common causes include a short circuit, damaged assist step motor, corroded or loose wiring connections, or a malfunctioning control module.
4. Can I still drive with the B051A:0B code active?
Yes, you can still drive the vehicle, but the left side assist step may not function. This could pose a safety or convenience issue when entering or exiting the vehicle.
5. How do I diagnose the B051A:0B code?
Start by visually inspecting the wiring and connectors for damage or corrosion. Then, test the assist step motor and control circuit for proper voltage and continuity.
6. How can I fix the B051A:0B code?
Repairs may include replacing a damaged assist step motor, repairing or replacing faulty wiring, cleaning corroded connectors, or reprogramming or replacing the control module.
7. How much does it cost to repair the B051A:0B code?
Repair costs vary depending on the issue but typically range from $100 to $500, depending on whether the motor, wiring, or control module needs replacement.
8. Can a blown fuse trigger the B051A:0B code?
While a blown fuse itself may not directly cause the code, it could be a symptom of an electrical short in the assist step motor circuit.
9. Does the B051A:0B code only affect certain vehicles?
This code is specific to vehicles equipped with motorized assist steps and may appear in brands or models that offer this feature, such as certain trucks or SUVs.
10. Will clearing the code fix the B051A:0B issue?
Clearing the code will temporarily remove it, but the underlying issue must be repaired to prevent the code from returning.
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