AutoCodes – GMC – U1160 GMC

U1160 GMC Code - Lost Communications With Driver Door 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 Driver Door Module (DDM), Driver Door Module harness is open or shorted, Driver Door 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: U1160 GMC indicates Lost Communications With Driver Door Module.
Common causes: Common causes include Faulty Driver Door Module (DDM), Driver Door Module harness is open or shorted, Driver Door 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 3,292

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 U1160 GMC 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) U1160 is set.

OBDII Code U1160 GMC - Lost Communications With Driver Door Module - AutoCodes.com — U1160 GMC Code - Lost Communications With Driver Door Module

What does this mean?

What are the Possible Causes of the DTC U1160 GMC?

Faulty Driver Door Module (DDM)
Driver Door Module harness is open or shorted
Driver Door Module circuit poor electrical connection

How to Fix the DTC U1160 GMC?

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 U1160 GMC 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 U1160 GMC Code

1. What are the common symptoms of OBDII code U1160 GMC?

- Common symptoms include power door lock issues, malfunctioning windows, inoperative mirror controls, and non-functional interior lights related to the driver door module.

2. What can cause the U1160 GMC code?

- The U1160 code is typically triggered by a communication failure between the vehicle's main computer and the driver door module due to wiring issues, module malfunctions, or software glitches.

3. How do I diagnose the U1160 GMC code?

- Diagnosing the U1160 code involves inspecting the wiring harness connected to the driver door module, checking for loose connections, testing the module itself, and scanning for other related trouble codes.

4. Can I still drive my vehicle with the U1160 code?

- While it may be possible to drive the vehicle with the U1160 code, it is recommended to address the issue promptly to avoid potential safety hazards and further electrical malfunctions.

5. How do I repair the U1160 GMC code?

- Repairing the U1160 code may involve repairing or replacing damaged wiring, resetting the driver door module, updating software, or replacing the module altogether if necessary.

6. Is the U1160 GMC code a serious issue?

- The U1160 code is not typically considered a serious issue in terms of vehicle safety, but it can cause inconvenience and affect the functionality of various driver door features.

7. Can weather conditions affect the U1160 code?

- Yes, extreme weather conditions like excessive heat or moisture can potentially exacerbate the communication issues between the main computer and the driver door module, leading to the U1160 code.

8. Can I reset the U1160 GMC code myself?

- In some cases, disconnecting the vehicle's battery for a few minutes may reset the code temporarily, but it's essential to address the underlying issue to prevent the code from reoccurring.

9. How long does it take to repair the U1160 GMC code?

- The repair time for the U1160 code can vary depending on the exact cause of the issue and the complexity of the repair process, but it may typically take a few hours to complete.

10. Can a DIY enthusiast fix the U1160 code?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the U1160 code may require specialized tools and expertise, making it advisable to consult a professional mechanic for assistance.