AutoCodes - Infiniti - U121B INFINITI

U121B INFINITI Code - Hard Disk Drive Communication Error

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U121B INFINITI code possible causes

  • Faulty Audio and Video (AV) Control Unit
  • Audio and Video Control Unit harness is open or shorted
  • Audio and Video Control Unit circuit poor electrical connection

|How do I fix the U121B INFINITI code?

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.

|Cost of diagnosing the U121B INFINITI code

Labor: 1.0

The cost of diagnosing the U121B INFINITI 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.

|What are U121B INFINITI code possible symptoms?

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

|U121B INFINITI code description

Integrates Hard Disk Drive (HDD) allowing map data and music data to be stored. It is the master unit of the MULTI AV system, and it is connected to each control unit by means of communication. It operates each system according to communication signals from the AV control unit. The AV control unit includes the audio, hands-free phone, voice control, navigation, and vehicle information functions. It is connected to ECM and combination meter via CAN communication to obtain necessary information for the vehicle information function.
The Diagnostic Trouble Code (DTC) sets when the Audio and Video (AV) Control Unit detects an internal malfunction of the Audio and Video (AV) Control Unit (HDD communication error).
OBDII Code U121b Infiniti - Hard Disk Drive Communication Error -

|Need more information with the U121B INFINITI code?

Need more information on how to fix the U121B INFINITI code? Get Access to Factory Service Manuals

|Need help with a U121B INFINITI code?

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|U121B INFINITI code comments

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