Engine-Codes - Generic - U1084

U1084 - Invalid Or Missing Data For Powertrain Status Request

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

U1084 Possible Causes

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

How is the U1084 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 U1084 code

Labor: 1.0

The cost to diagnose the U1084 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)

U1084 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 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.

More Information

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