AutoCodes – GMC – U2166 GMC

U2166 GMC 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 GMC 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 481

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

What does this mean?

What are the Possible Causes of the DTC U2166 GMC?

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 GMC?

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 GMC 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 U2166 GMC Code

1. What are the common symptoms of OBDII code U2166 GMC (Lost Communication With Driver Position Module)?

- Common symptoms include the loss of communication with the driver position module, illuminated warning lights on the dashboard, and issues with power seat adjustment.

2. What are the possible causes of OBDII code U2166 GMC?

- The code U2166 GMC can be caused by a faulty driver position module, damaged wiring or connectors, a blown fuse, or a software glitch in the vehicle's system.

3. How can I diagnose the issue related to OBDII code U2166 GMC?

- To diagnose the issue, you can use a diagnostic scan tool to retrieve the trouble codes, check the wiring and connectors for any visible damage, and inspect the driver position module for any signs of malfunction.

4. Is it safe to continue driving with OBDII code U2166 GMC active?

- It is not recommended to continue driving with the U2166 code present, as it may lead to further electrical issues or affect the functionality of critical systems in the vehicle.

5. How can I repair OBDII code U2166 GMC myself?

- If you have experience with automotive electrical systems, you can attempt to repair the issue by checking and repairing any damaged wiring or connectors, resetting the module, or replacing the driver position module if necessary.

6. Can a mechanic help me fix OBDII code U2166 GMC?

- Yes, a qualified mechanic can diagnose and repair the issue related to code U2166 GMC by using specialized diagnostic equipment, performing thorough inspections, and replacing faulty components as needed.

7. Will resetting the trouble codes make OBDII code U2166 GMC disappear?

- Resetting the trouble codes may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

8. How much does it typically cost to repair OBDII code U2166 GMC at a dealership?

- The cost of repairing OBDII code U2166 GMC at a dealership can vary depending on the extent of the damage and the specific repairs needed, but it may range from a few hundred to over a thousand dollars.

9. Can a dead battery cause OBDII code U2166 GMC to appear?

- Yes, a dead or low battery can sometimes trigger communication errors and cause the U2166 code to appear, as it can disrupt the power supply to the driver position module.

10. Is the driver position module a common failure point for OBDII code U2166 GMC?

- Yes, the driver position module is a common component that can fail and trigger the U2166 code, especially if it has been exposed to extreme temperatures, moisture, or physical damage.