AutoCodes – Buick – U1162 Buick

U1162 Buick 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 Buick 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 760

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 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) U1162 is set.

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

What does this mean?

What are the Possible Causes of the DTC U1162 Buick?

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 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 U1162 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 U1162 Buick Code

1. What are the common symptoms of OBDII code U1162 in a Buick related to the liftgate/endgate control module?

The common symptoms may include non-functioning liftgate/endgate, inability to open or close the liftgate/endgate electronically, and warning lights on the dashboard.

2. What could cause the OBDII code U1162 "Lost Communications With Liftgate/Endgate Control Module" in a Buick?

Potential causes of this code include a faulty liftgate/endgate control module, damaged wiring or connectors leading to the module, or communication network issues within the vehicle.

3. How can I diagnose the U1162 code in my Buick related to the liftgate/endgate control module?

Diagnosis typically involves using an OBDII scanner to read the code, checking the wiring and connectors for any visible damage, and testing the control module's functionality.

4. Can I still use my Buick if the U1162 code related to the liftgate/endgate control module is present?

While the vehicle may still be operable, it is recommended to address the issue promptly to avoid further complications with the liftgate/endgate operation.

5. Is it safe to drive with the U1162 code related to the liftgate/endgate control module in a Buick?

It is generally safe to drive with this code, but you may experience inconvenience due to the non-functioning liftgate/endgate. Ensure to secure the cargo in the trunk manually if needed.

6. How can I repair the U1162 code in my Buick caused by a lost communication with the liftgate/endgate control module?

Repair options may include replacing the faulty control module, repairing damaged wiring or connectors, or addressing any communication network issues within the vehicle.

7. Are there any DIY tips for fixing the U1162 code related to the liftgate/endgate control module in a Buick?

DIY tips may include carefully inspecting the wiring for any visible damage, ensuring proper connections, and following the vehicle's service manual for specific repair procedures.

8. Will resetting the trouble codes clear the U1162 code related to the liftgate/endgate control module in my Buick?

Resetting the trouble codes may temporarily clear the code, but if the underlying issue with the liftgate/endgate control module is not addressed, the code is likely to reappear.

9. How much does it typically cost to repair the U1162 code caused by a lost communication with the liftgate/endgate control module in a Buick?

The cost of repairs can vary depending on the specific issue, but it may involve parts and labor expenses for replacing the control module or repairing the wiring/connectors.

10. Can a mechanic or dealership help diagnose and repair the U1162 code related to the liftgate/endgate control module in my Buick?

Yes, experienced mechanics or dealership service centers have the necessary tools and expertise to diagnose and repair issues related to the liftgate/endgate control module, including the U1162 trouble code.