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Engine-Codes – Generic – U1528

U1528 Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

Quick Answer

The diagnostic trouble code U1528 indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Adjuster Switch on the LIN (Local Interconnect Network) bus. Common causes include Faulty wiring or connectors between the control module and the adjuster switch, Malfunctioning Driver/Passenger Seat Memory Control Module, Defective Driver/Passenger Seat Adjuster Switch. 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
U1528 indicates Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus.
Common causes
Common causes include Faulty wiring or connectors between the control module and the adjuster switch, Malfunctioning Driver/Passenger Seat Memory Control Module, Defective Driver/Passenger Seat Adjuster Switch.
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 11, 2024
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Code U1528 Description

The diagnostic trouble code U1528 indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Adjuster Switch on the LIN (Local Interconnect Network) bus. This communication error can disrupt the functioning of the seat memory system in the vehicle, which is responsible for storing and recalling the seat position preferences of the driver and passenger.

OBDII Code U1528 - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
U1528 Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

Common Causes of U1528

  1. Faulty wiring or connectors between the control module and the adjuster switch.
  2. Malfunctioning Driver/Passenger Seat Memory Control Module.
  3. Defective Driver/Passenger Seat Adjuster Switch.
  4. Communication error within the LIN bus network.
  5. Water damage or corrosion affecting the components.

Symptoms of U1528

  1. Inability to adjust the seat position using the memory function.
  2. Error message or warning light related to the seat memory system on the dashboard.
  3. Inconsistent or erratic seat adjustments.
  4. Loss of functionality in other systems linked to the seat memory control module.

How to Fix U1528

  1. Begin by conducting a visual inspection of the wiring and connectors between the control module and the switch to check for any visible damage or loose connections.
  2. Use a diagnostic scan tool to communicate with the seat memory control module and the adjuster switch to identify the source of the communication error.
  3. Test the functionality of the control module and the switch to determine if either component needs to be replaced.
  4. If necessary, repair or replace any damaged wiring or connectors and ensure proper connections are established.
  5. Clear the diagnostic trouble code from the vehicle's system and test the seat memory function to confirm that the issue has been resolved.

Cost to Fix U1528

The typical repair costs for addressing the U1528 code can vary depending on the specific cause of the issue and the parts or components that need to be replaced. Generally, the cost of replacing a faulty Driver/Passenger Seat Memory Control Module or Adjuster Switch can range from $200 to $500 each, including parts and labor. If the issue is related to wiring repairs or connector replacements, the cost can be lower, typically ranging from $100 to $300.

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Code U1528 Information for Specific Makes

  • U1528 Buick — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
  • U1528 Cadillac — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
  • U1528 Chevrolet — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
  • U1528 GMC — Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
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 U1528 Code

1. What does OBDII code U1528 mean?

Code U1528 indicates that the Driver/Passenger Seat Memory Control Module has lost communication with the Driver/Passenger Seat Adjuster Switch over the LIN (Local Interconnect Network) Bus.

2. What are the common symptoms of code U1528?

Symptoms may include the seat memory function not working, inability to adjust the seat, unresponsive seat controls, or the appearance of a warning light on the dashboard.

3. What causes OBDII code U1528 to appear?

Common causes include a faulty seat memory control module, a defective seat adjuster switch, damaged LIN bus wiring, poor electrical connections, or software issues.

4. Can I still drive my car with code U1528?

Yes, code U1528 does not typically affect drivability, but it may prevent certain seat adjustments or memory functions from operating properly.

5. How do I diagnose U1528?

Start by checking the wiring and connectors between the seat memory control module and the seat adjuster switch. Use a scan tool to verify communication on the LIN bus and test the related components for faults.

6. Can a blown fuse cause code U1528?

Yes, a blown fuse in the circuit supplying power to the seat memory control module or seat adjuster switch can lead to a loss of communication and trigger this code.

7. How is code U1528 fixed?

Repairs may involve replacing a faulty seat memory control module or seat adjuster switch, repairing damaged wiring, cleaning corroded connectors, or reprogramming the module if needed.

8. Is replacing the seat memory control module always necessary for U1528?

No, replacing the module is not always necessary. The issue could be related to wiring, connectors, or a minor software glitch that can be resolved without replacement.

9. How much does it cost to repair code U1528?

Repair costs vary depending on the issue, but fixing wiring or connectors is usually cheaper than replacing the seat memory control module or seat adjuster switch, which can cost several hundred dollars.

10. Can a software update resolve U1528?

Yes, if the issue is related to a software glitch in the seat memory control module, a software update from the vehicle manufacturer may resolve the problem.

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