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Engine-Codes – Generic – B2155

B2155 Code - Seat Horizontal Motor Position Out of Range

Quick Answer

The B2155 diagnostic trouble code (DTC) indicates that the seat horizontal motor position is out of range. Common causes include Faulty seat horizontal motor, Damaged wiring or connectors in the seat adjustment system, Malfunctioning control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B2155 indicates Seat Horizontal Motor Position Out of Range.
Common causes
Common causes include Faulty seat horizontal motor, Damaged wiring or connectors in the seat adjustment system, Malfunctioning control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 28, 2024
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Code B2155 Description

The B2155 diagnostic trouble code (DTC) indicates that the seat horizontal motor position is out of range. This means that the seat's horizontal adjustment motor is not functioning properly or is not able to reach the correct position as commanded by the vehicle's control module. The seat horizontal motor is responsible for moving the seat back and forth to adjust the seating position for the driver or passenger. When this motor is not operating correctly, it can lead to discomfort for the occupants and potentially compromise their safety and driving experience.

OBDII Code B2155 - Seat Horizontal Motor Position Out of Range
B2155 Code - Seat Horizontal Motor Position Out of Range

Common Causes of B2155

  1. Faulty seat horizontal motor.
  2. Damaged wiring or connectors in the seat adjustment system.
  3. Malfunctioning control module.
  4. Mechanical obstructions preventing the seat from moving properly.
  5. Corrosion or rust affecting the seat adjustment components.

Symptoms of B2155

  1. Inability to adjust the seat horizontally.
  2. Seat moving erratically or only in one direction.
  3. Unusual noises coming from the seat adjustment mechanism.
  4. Seat getting stuck in one position.
  5. Warning light on the dashboard indicating a seat adjustment system malfunction.

How to Fix B2155

  1. Begin by conducting a visual inspection of the seat adjustment system, looking for any visible damage, loose connections, or obstructions.
  2. Use a diagnostic scan tool to retrieve the specific error codes and data related to the seat horizontal motor position.
  3. Test the seat horizontal motor by applying power directly to it to check if it responds correctly.
  4. Inspect the wiring harness and connectors for any signs of damage or corrosion, repairing or replacing as needed.
  5. If the issue persists, consider replacing the seat horizontal motor or the control module, following manufacturer guidelines for proper installation.

Cost to Fix B2155

The typical repair costs for addressing a B2155 code can vary depending on the specific cause of the issue and the parts and labor required for the repair. In general, replacing a faulty seat horizontal motor or control module can range from $200 to $500, including parts and labor. However, additional costs may apply if wiring or connectors need to be repaired or replaced. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.

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Code B2155 Information for Specific Makes

  • B2155 Acura — Driver Side MPCS Unit Lost Communication With MICU
  • B2155 Honda — Driver Side MPCS Unit Lost Communication With MICU
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 B2155 Code

1. What does the OBDII code B2155 mean?

B2155 indicates that the seat horizontal motor's position sensor has detected a value outside the expected range, often caused by a malfunction in the motor or sensor.

2. What are the common symptoms of code B2155?

Symptoms include the inability to adjust the seat horizontally, unusual noises from the seat motor, or the seat moving erratically or becoming stuck.

3. What causes the B2155 code to appear?

Common causes include a faulty seat horizontal motor, a damaged position sensor, wiring issues such as frayed or loose connections, or mechanical obstructions in the seat track.

4. Can I still drive my car with a B2155 code?

Yes, the car is still drivable, but you may lose the ability to adjust the seat horizontally, which could affect comfort and driving ergonomics.

5. How can I diagnose a B2155 code?

Start by inspecting the seat motor and position sensor for visible damage, check electrical connections and wiring for continuity, and use a scan tool to monitor sensor readings.

6. What tools do I need to repair a B2155 code?

You'll need a multimeter to check electrical connections, a diagnostic scan tool to monitor live data, and basic hand tools to access and repair the seat motor or sensor.

7. How much does it cost to fix a B2155 code?

Costs vary depending on the issue, but repairing or replacing a seat motor or position sensor typically ranges from $200 to $500, including parts and labor.

8. Can I fix a B2155 code myself?

If you're comfortable working with automotive electrical systems, you can attempt a DIY fix by inspecting wiring, cleaning connections, or replacing the motor or sensor.

9. Does a B2155 code always mean the seat motor is faulty?

No, the issue could also be caused by a malfunctioning position sensor, damaged wiring, or debris obstructing the seat track.

10. Will clearing the B2155 code solve the problem?

Clearing the code without addressing the root cause will not fix the issue, and the code is likely to return. Proper diagnosis and repair are necessary.

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