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Engine-Codes – Generic – U1173

U1173 Code - Lost Communications With Power Roof Module

Quick Answer

The U1173 code indicates that there is a communication issue between the vehicle's onboard computer system and the Power Roof Module. Common causes include Faulty wiring connections, Power Roof Module failure, Communication network issues. 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
U1173 indicates Lost Communications With Power Roof Module.
Common causes
Common causes include Faulty wiring connections, Power Roof Module failure, Communication network issues.
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 U1173 Description

The U1173 code indicates that there is a communication issue between the vehicle's onboard computer system and the Power Roof Module. The Power Roof Module is responsible for controlling the operation of the power roof or convertible top in the vehicle. When communication is lost with this module, it can lead to issues with opening or closing the roof, as well as potential safety concerns.

OBDII Code U1173 - Lost Communications With Power Roof Module
U1173 Code - Lost Communications With Power Roof Module

Common Causes of U1173

  1. Faulty wiring connections.
  2. Power Roof Module failure.
  3. Communication network issues.
  4. Software malfunction in the vehicle's computer system.

Symptoms of U1173

  1. Power roof not opening or closing.
  2. Warning lights on the dashboard related to the power roof.
  3. Unusual noises when operating the power roof.
  4. Inability to control the power roof using the switch or remote.

How to Fix U1173

  1. Begin by conducting a thorough inspection of the wiring connections related to the Power Roof Module.
  2. Use a diagnostic scan tool to communicate with the module and check for error codes.
  3. Test the Power Roof Module for proper functionality and replace if necessary.
  4. Check the communication network for any faults or breaks in the connections.
  5. Update the vehicle's software system if a software glitch is suspected to be the cause of the communication issue.

Cost to Fix U1173

The cost of repairing a U1173 code can vary depending on the specific cause of the issue. Generally, replacing a faulty Power Roof Module can cost anywhere from $200 to $600, including parts and labor. Wiring repairs or communication network fixes may add to the overall cost. It's recommended to consult with a professional mechanic to get an accurate estimate based on the vehicle's make and model. Keep in mind that diagnostic time and labor rates can vary, so it's essential to consider these factors when budgeting for the repair.

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Code U1173 Information for Specific Makes

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 U1173 Code

1. What does the OBDII code U1173 mean?

U1173 indicates a loss of communication between the vehicle's Power Roof Module and other control modules on the communication network.

2. What are common symptoms of code U1173?

Symptoms may include a malfunctioning power roof, inability to open or close the roof, and possible warning lights on the dashboard.

3. What causes the U1173 code to appear?

The code can be caused by faulty wiring or connectors, a failed Power Roof Module, or issues within the vehicle's communication network.

4. Can a weak battery trigger the U1173 code?

Yes, a weak or failing battery can disrupt communication between modules and lead to this code.

5. How can I diagnose the U1173 code?

Start by inspecting all wiring and connectors related to the Power Roof Module, check for module power and ground, and use a scan tool to monitor communication signals.

6. Is it safe to drive with the U1173 code?

While the code itself may not affect drivability, it can limit the functionality of the power roof, which may be a safety concern if the roof is stuck open.

7. How is the U1173 code repaired?

Repairs may involve fixing or replacing damaged wiring or connectors, reprogramming the module, or replacing the Power Roof Module if it’s defective.

8. Can software issues cause the U1173 code?

Yes, outdated or corrupted software in the Power Roof Module or other related modules can lead to communication errors.

9. How much does it cost to fix the U1173 code?

Repair costs can vary widely, from $50 for minor wiring repairs to $500 or more if the Power Roof Module needs replacement.

10. Can I clear the U1173 code without fixing the root cause?

Clearing the code with a scan tool may temporarily remove it, but it will likely return if the underlying issue is not resolved.

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