Engine-Codes - Generic - U1170

U1170 - Lost Communications With Driver Door Switch Assembly

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U1170 Possible Causes

  • Faulty Driver Door Switch Assembly
  • Driver Door Switch Assembly harness is open or shorted
  • Driver Door Switch Assembly circuit poor electrical connection

How is the U1170 code repair?

Start by checking 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.

What is the cost to diagnose the U1170 code

Labor: 1.0

The cost to diagnose the U1170 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.
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Possible Symptoms

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

U1170 Meaning

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) U1170 is set.

More Information

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Information for specific makes

  • U1170 BUICK Lost Communications With Driver Door Switch Assembly
  • U1170 CADILLAC Lost Communications With Driver Door Switch Assembly
  • U1170 CHEVROLET Lost Communications With Driver Door Switch Assembly
  • U1170 GMC Lost Communications With Driver Door Switch Assembly

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