Engine-Codes - Generic - U2101

U2101 - CAN Bus Maximum List Of Control Modules

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

U2101 Possible Causes

  • Device that is not configured properly
  • Faulty device that is not communicating
  • Device harness is open or shorted
  • Device circuit poor electrical connection

How is the U2101 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 U2101 code

Labor: 1.0

The cost to diagnose the U2101 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)

U2101 Meaning

Some devices must be programmed with software that specifically identifies the correct type and quantity of devices on the serial data bus based on RPO configuration. If a device was not properly configured after installation, the appropriate U Code may be set for that device. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will set when the following conditions are set: The device is not configured properly, the control unit recognizes a programming error, the Controller Area Network (CAN) Bus configuration is invalid.

More Information

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