AutoCodes – Generic – U2165

U2165 Code - Lost Communication With Driver Door Switch

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Driver Door Switch (DDS), Driver Door Switch harness is open or shorted, Driver Door Switch 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: U2165 indicates Lost Communication With Driver Door Switch.
Common causes: Common causes include Faulty Driver Door Switch (DDS), Driver Door Switch harness is open or shorted, Driver Door Switch 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 1,143

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 Jun 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2165 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2165 - Lost Communication With Driver Door Switch - AutoCodes.com — U2165 Code - Lost Communication With Driver Door Switch

What does this mean?

What are the Possible Causes of the DTC U2165?

Faulty Driver Door Switch (DDS)
Driver Door Switch harness is open or shorted
Driver Door Switch circuit poor electrical connection

How to Fix the DTC U2165?

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 U2165 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.

Need more information about the U2165 code?

Need more information on how to fix the U2165 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2165 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2165 Buick — Lost Communication With Driver Door Switch
U2165 Cadillac — Lost Communication With Driver Door Switch
U2165 Chevrolet — Lost Communication With Driver Door Switch
U2165 GMC — Lost Communication With Driver Door Switch

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 U2165 Code

1. What does the OBDII code U2165 mean?

U2165 indicates that the vehicle's control modules have lost communication with the Driver Door Switch (DDS), which may affect door-related functions like locks, windows, and mirrors.

2. What are the common symptoms of code U2165?

Symptoms include non-functional power windows, door locks, or mirrors, interior lights not responding when the door is opened, and possible warning lights on the dashboard.

3. What causes the U2165 code to appear?

The most common causes are faulty wiring or connectors, a malfunctioning Driver Door Switch (DDS), or issues with the Controller Area Network (CAN) communication system.

4. Can a dead battery cause the U2165 code?

Yes, a dead or weak battery can disrupt communication between modules, potentially triggering the U2165 code.

5. How can I diagnose the U2165 code?

Start by checking the wiring and connectors for the Driver Door Switch, inspect the DDS for physical damage, and use a scan tool to check for related codes and CAN bus communication errors.

6. Is it safe to drive with the U2165 code?

While the vehicle may still be drivable, impaired door functions such as locks and windows can pose safety or convenience issues.

7. How do I fix the U2165 code?

Repairs may include repairing or replacing damaged wiring, cleaning or reconnecting connectors, replacing the Driver Door Switch, or addressing CAN bus network faults.

8. Can I clear the U2165 code without fixing the issue?

Clearing the code with a scan tool may temporarily remove it, but the issue will likely return if the underlying problem is not resolved.

9. How much does it cost to fix the U2165 code?

Costs vary depending on the cause, ranging from $50 to $150 for wiring repairs to $200 or more if the Driver Door Switch needs replacement.

10. Can a software update fix the U2165 code?

In rare cases, a software update for the vehicleâ€™s control modules may resolve communication issues, but this depends on the make and model. Consult a dealership for details.