AutoCodes – Chevrolet – U1173 Chevrolet

U1173 Chevrolet Code - Lost Communications With Power Roof Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Power Roof Module (PRM), Power Roof Module harness is open or shorted, Power Roof Module circuit poor electrical connection. 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 Chevrolet indicates Lost Communications With Power Roof Module.
Common causes: Common causes include Faulty Power Roof Module (PRM), Power Roof Module harness is open or shorted, Power Roof Module circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 510

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1173 Chevrolet Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1173 is set.

OBDII Code U1173 Chevrolet - Lost Communications With Power Roof Module - AutoCodes.com — U1173 Chevrolet Code - Lost Communications With Power Roof Module

What does this mean?

What are the Possible Causes of the DTC U1173 Chevrolet?

Faulty Power Roof Module (PRM)
Power Roof Module harness is open or shorted
Power Roof Module circuit poor electrical connection

How to Fix the DTC U1173 Chevrolet?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1173 Chevrolet 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.

Need more information about the U1173 Chevrolet code?

Need more information on how to fix the U1173 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1173 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 Chevrolet Code

1. What are common symptoms of OBDII code U1173 in a Chevrolet related to the Power Roof Module?

- Common symptoms include issues with the power roof operation, such as the roof not opening or closing properly, erratic behavior, or complete failure.

2. What are the possible causes of the U1173 code indicating lost communications with the Power Roof Module in a Chevrolet?

- The code U1173 can be triggered by issues such as a faulty Power Roof Module, wiring problems, poor connections, or a malfunctioning communication network.

3. How can I diagnose the U1173 code in my Chevrolet indicating lost communications with the Power Roof Module?

- Diagnosis typically involves checking the Power Roof Module for proper function, inspecting the wiring and connections for any damage, and using a diagnostic scanner to analyze communication issues.

4. What are some tips for repairing the U1173 code in a Chevrolet related to the Power Roof Module?

- Repair tips may include fixing any damaged wiring or connections, replacing the Power Roof Module if necessary, ensuring proper communication network function, and clearing the code with a diagnostic tool.

5. Can the U1173 code related to the Power Roof Module in a Chevrolet be reset without fixing the underlying issue?

- While the code can be cleared temporarily, it is important to address the root cause to prevent recurring issues with the power roof module and ensure proper functionality.

6. Is it safe to continue driving my Chevrolet with the U1173 code indicating lost communications with the Power Roof Module?

- It is not recommended to drive the vehicle with unresolved U1173 code issues, as it may affect the operation of the power roof and potentially lead to further damage or safety concerns.

7. How much does it typically cost to repair the U1173 code in a Chevrolet related to the Power Roof Module?

- Repair costs can vary depending on the specific issue causing the code, but they may include expenses for parts replacement, labor, diagnostic fees, and any necessary repairs to the communication network.

8. Can I fix the U1173 code related to the Power Roof Module in my Chevrolet myself, or do I need to take it to a professional mechanic?

- While some simple issues like checking connections or fuses can be done by DIY enthusiasts, resolving complex problems with the Power Roof Module or communication network may require the expertise of a professional mechanic.

9. Are there any preventive measures I can take to avoid encountering the U1173 code in my Chevrolet related to the Power Roof Module?

- Regularly inspecting the power roof components, keeping the connections clean and secure, and addressing any issues promptly can help prevent the occurrence of the U1173 code.

10. How long does it typically take to repair the U1173 code indicating lost communications with the Power Roof Module in a Chevrolet?

- The repair time can vary based on the specific issue causing the code, the availability of parts, and the expertise of the mechanic, but it may range from a few hours to a full day in some cases.