AutoCodes – Generic – U2166

U2166 Code - Lost Communication With Driver Position Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Driver Position Module (DPM), Driver Position Module harness is open or shorted, Driver Position 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: U2166 indicates Lost Communication With Driver Position Module.
Common causes: Common causes include Faulty Driver Position Module (DPM), Driver Position Module harness is open or shorted, Driver Position 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 1,068

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 U2166 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 U2166 - Lost Communication With Driver Position Module - AutoCodes.com — U2166 Code - Lost Communication With Driver Position Module

What does this mean?

What are the Possible Causes of the DTC U2166?

Faulty Driver Position Module (DPM)
Driver Position Module harness is open or shorted
Driver Position Module circuit poor electrical connection

How to Fix the DTC U2166?

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 U2166 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 U2166 code?

Need more information on how to fix the U2166 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2166 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2166 Buick — Lost Communication With Driver Position Module
U2166 Cadillac — Lost Communication With Driver Position Module
U2166 Chevrolet — Lost Communication With Driver Position Module
U2166 GMC — Lost Communication With Driver Position Module

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 U2166 Code

1. What are the common symptoms of OBDII code U2166?

- Common symptoms include issues with power seat functionality, malfunctioning seat controls, and warning lights on the dashboard.

2. What are the possible causes of code U2166 indicating lost communication with the Driver Position Module?

- The possible causes include a faulty driver position module, damaged wiring or connectors, software issues, or a malfunctioning CAN bus system.

3. How can I diagnose the U2166 code related to the Driver Position Module issue?

- Diagnose the code by checking the wiring and connectors for damage, testing the driver position module for functionality, and using a diagnostic scanner to retrieve specific error codes.

4. Can I still drive my vehicle with the U2166 code present?

- It is generally not recommended to drive the vehicle with the U2166 code, as it can affect the proper functioning of the driver position module and potentially lead to safety concerns.

5. How can I repair the U2166 code indicating lost communication with the Driver Position Module?

- Repair options include replacing the driver position module if it is faulty, repairing damaged wiring or connectors, updating software if needed, and ensuring proper communication within the CAN bus system.

6. Is it possible to clear the U2166 code without addressing the root cause?

- Clearing the code without addressing the root cause may temporarily remove the warning light, but the issue will likely reappear until the underlying problem with the driver position module communication is resolved.

7. Can a DIY enthusiast fix the U2166 code issue at home?

- DIY enthusiasts with experience in automotive repairs and access to diagnostic tools may be able to address the U2166 code issue at home, especially if it involves checking wiring, connectors, and module functionality.

8. What other systems or components may be affected by the U2166 code?

- Other systems that rely on communication with the driver position module, such as seat adjustments, memory settings, and safety features, may also be affected by the U2166 code.

9. How long does it typically take to repair the U2166 code related to lost communication with the Driver Position Module?

- The repair time for the U2166 code can vary depending on the specific cause of the issue, but it may take anywhere from a few hours to a day to diagnose and fix the problem.

10. Is it necessary to reset the system after repairing the U2166 code?

- Yes, it is important to reset the system after repairing the U2166 code to clear any stored error codes and ensure proper communication and functionality of the driver position module.