Engine-Codes - Generic - U1170

U1170 Code - Lost Communications With Driver Door Switch Assembly

- Code Popularity: 5,315 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC U1170?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Driver Door Switch Assembly
  • Driver Door Switch Assembly harness is open or shorted
  • Driver Door Switch Assembly circuit poor electrical connection
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC U1170?

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 pins.

Search for U1170 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the U1170 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the U1170 Code Mean?

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.

U1170 Code - Lost Communications With Driver Door Switch Assembly

Need more Information on the Code?

Need more information on how to fix the U1170 code? Get Access to Factory Service Manuals

Code U1170 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

Need Help with the Code?

Get the U1170 code diagnosed by a professional: Find a repair shop in your area