AutoCodes - Generic - U1166

U1166 Code - Lost Communications With Driver Seat Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U1166 code possible causes

  • Faulty Driver Seat Module
  • Driver Seat Module harness is open or shorted
  • Driver Seat Module circuit poor electrical connection

|How do I fix the U1166 code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the U1166 code

Labor: 1.0

The cost of diagnosing the U1166 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U1166 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U1166 code 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) U1166 is set.
OBDII Code U1166 - Lost Communications With Driver Seat Module -

|Need more information with the U1166 code?

Need more information on how to fix the U1166 code? Get Access to Factory Service Manuals

|U1166 code information for specific makes

|Need help with a U1166 code?

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|U1166 code comments

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