AutoCodes – Pontiac – U1173 Pontiac

U1173 Pontiac 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 Pontiac 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.

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Code Popularity 454

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

What does this mean?

What are the Possible Causes of the DTC U1173 Pontiac?

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 Pontiac?

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 Pontiac 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.

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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 Pontiac Code

1. What are the common symptoms of OBDII code U1173 in a Pontiac related to lost communications with the power roof module?

- Common symptoms include malfunctioning power roof operation, inoperative roof controls, and warning lights on the dashboard.

2. What are the possible causes of OBDII code U1173 in a Pontiac indicating lost communications with the power roof module?

- The code U1173 can be triggered by issues such as faulty wiring connections, a defective power roof module, or a malfunctioning communication network.

3. How can I diagnose the cause of OBDII code U1173 in my Pontiac for the power roof module communication error?

- Diagnosing the issue may involve checking the wiring connections, inspecting the power roof module for any visible damage, and using a scan tool to analyze communication signals.

4. Is it safe to continue driving my Pontiac with OBDII code U1173 present for the power roof module communication error?

- It is recommended to address the issue promptly to avoid potential safety hazards and further damage to the power roof system.

5. What are some repair tips for fixing OBDII code U1173 in a Pontiac due to lost communications with the power roof module?

- Repair tips may include checking and repairing any damaged wiring, replacing the power roof module if necessary, and resetting the system after repairs are made.

6. Can a DIY enthusiast resolve OBDII code U1173 in a Pontiac related to the power roof module communication issue?

- DIY enthusiasts with automotive repair experience may be able to address the issue by following repair guides, but professional diagnosis and repair are recommended for complex electrical problems.

7. How much can I expect to pay to fix OBDII code U1173 in a Pontiac caused by lost communications with the power roof module?

- The cost of repairs for code U1173 can vary depending on the extent of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

8. Are there any preventive measures to avoid encountering OBDII code U1173 in a Pontiac due to power roof module communication problems?

- Regular maintenance checks, ensuring proper wiring connections, and addressing any minor issues promptly can help prevent the occurrence of code U1173 and related problems.

9. Will resetting the OBDII system clear code U1173 in a Pontiac for the power roof module communication error?

- Resetting the OBDII system may temporarily clear the code, but it is essential to diagnose and fix the underlying issue to prevent the code from reappearing.

10. Can extreme weather conditions or water damage contribute to triggering OBDII code U1173 in a Pontiac associated with the power roof module communication failure?

- Yes, extreme weather conditions, water ingress, or moisture exposure can potentially cause electrical issues leading to code U1173, so it's crucial to protect the vehicle from such elements.