U1199 - Invalid Or Missing Data For External Access

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

U1199 Possible Causes

  • Faulty Module that is not communicating
  • Module harness is open or shorted
  • Module circuit poor electrical connection

How do I fix code U1199?

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.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Cost of diagnosing the U1199 code

Labor: 1.0

The cost of diagnosing the U1199 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

U1199 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 State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.
OBDII Code U1199 - Invalid Or Missing Data For External Access - AutoCodes.com

More Information

Need more information on how to fix the U1199 code?
Get Access to Factory Service Manuals

Need more help?

Get the U1199 code diagnosed by a professional: Find a repair shop in your area

Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the U1199 code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧