AutoCodes – Buick – U1160 Buick

U1160 Buick 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 Buick 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 832

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

What does this mean?

What are the Possible Causes of the DTC U1160 Buick?

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 Buick?

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 Buick 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 Buick Code

1. What does the OBDII code U1160 mean for a Buick?

The U1160 code indicates a loss of communication between the Driver Door Module (DDM) and other control modules in the vehicle.

2. What are common symptoms of the U1160 code on a Buick?

Symptoms may include malfunctioning power windows, mirrors, or door locks, as well as warning lights on the dashboard.

3. What causes the U1160 code on a Buick?

Possible causes include a faulty Driver Door Module, wiring issues, loose or corroded connectors, or network communication faults.

4. Can a weak battery cause the U1160 code on a Buick?

Yes, a weak or failing battery can disrupt module communication, potentially triggering the U1160 code.

5. How do I diagnose the U1160 code on a Buick?

Diagnose by checking the wiring and connectors to the Driver Door Module, scanning for related codes, and testing the DDM for functionality.

6. Can I still drive my Buick with a U1160 code?

You can drive the vehicle, but certain features like power locks and windows may not work properly, and ignoring the issue could lead to further electrical problems.

7. How do I fix the U1160 code on a Buick?

Repairs may involve inspecting and repairing damaged wiring, cleaning connectors, or replacing the Driver Door Module if it's faulty.

8. Can a software issue cause the U1160 code on a Buick?

Yes, outdated or corrupted module software can lead to communication errors and may require a software update or reprogramming.

9. How much does it cost to repair the U1160 code on a Buick?

Repair costs can vary, but diagnosing and fixing wiring issues or replacing the Driver Door Module typically ranges from $150 to $500.

10. Will clearing the U1160 code fix the problem on a Buick?

Clearing the code may temporarily reset the system, but the underlying issue must be resolved to prevent the code from returning.

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