AutoCodes – Chevrolet – U1162 Chevrolet

U1162 Chevrolet Code - Lost Communications With Liftgate/Endgate Control 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 Liftgate/Endgate Control Module (LGM/EGM), Liftgate/Endgate Control Module harness is open or shorted, Liftgate/Endgate Control 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: U1162 Chevrolet indicates Lost Communications With Liftgate/Endgate Control Module.
Common causes: Common causes include Faulty Liftgate/Endgate Control Module (LGM/EGM), Liftgate/Endgate Control Module harness is open or shorted, Liftgate/Endgate Control 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 2,776

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 U1162 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) U1162 is set.

OBDII Code U1162 Chevrolet - Lost Communications With Liftgate/Endgate Control Module - AutoCodes.com — U1162 Chevrolet Code - Lost Communications With Liftgate/Endgate Control Module

What does this mean?

What are the Possible Causes of the DTC U1162 Chevrolet?

Faulty Liftgate/Endgate Control Module (LGM/EGM)
Liftgate/Endgate Control Module harness is open or shorted
Liftgate/Endgate Control Module circuit poor electrical connection

How to Fix the DTC U1162 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 U1162 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.

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Get the U1162 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 U1162 Chevrolet Code

1. What does the OBDII code U1162 for Chevrolet indicate?

The code U1162 means "Lost Communications With Liftgate/Endgate Control Module."

2. What are the common symptoms of U1162 code in a Chevrolet vehicle?

Common symptoms include the liftgate or endgate not responding to commands, failure of the liftgate or endgate to open or close, and warning lights on the dashboard.

3. What are the possible causes of the U1162 code in a Chevrolet?

The U1162 code can be triggered by issues such as a faulty liftgate/endgate control module, damaged wiring or connectors, blown fuses, or a malfunction in the communication network.

4. How can I diagnose the U1162 code in my Chevrolet?

Diagnosing the U1162 code typically involves using a professional OBDII scanner to retrieve the code, checking the liftgate/endgate control module for power and ground, inspecting the wiring and connectors for damage, and testing the communication network.

5. How can I repair the U1162 code in my Chevrolet?

Repairing the U1162 code may involve replacing the liftgate/endgate control module, repairing or replacing damaged wiring or connectors, checking and replacing blown fuses, and ensuring proper communication on the network.

6. Can I drive my Chevrolet with the U1162 code?

It is not recommended to drive your Chevrolet with the U1162 code present, as it can affect the functionality of the liftgate or endgate, potentially causing safety hazards or inconveniences.

7. How much does it cost to repair the U1162 code in a Chevrolet?

The cost of repairing the U1162 code can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any necessary parts. It is advisable to get a diagnostic and repair estimate from a professional technician.

8. Are there any DIY tips for troubleshooting the U1162 code in a Chevrolet?

While basic checks like inspecting fuses and connectors can be done by DIY enthusiasts, diagnosing and repairing the U1162 code often requires advanced tools and expertise. It is recommended to seek help from a qualified mechanic.

9. Will resetting the U1162 code make it go away permanently?

Resetting the U1162 code may temporarily clear the warning light, but if the underlying issue causing the code is not fixed, it is likely to reappear. It is crucial to diagnose and repair the root cause of the problem.

10. Is the U1162 code common in Chevrolet vehicles?

The U1162 code related to lost communications with the liftgate/endgate control module is specific to Chevrolet vehicles and can occur in models equipped with this module.