AutoCodes – Infiniti – U0104 Infiniti

U0104 Infiniti Code - Lost Communication With Advanced Driver Assistance Systems Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Advanced Driver Assistance Systems (ADAS) Control Module, Advanced Driver Assistance Systems Control Module harness is open or shorted, Advanced Driver Assistance Systems Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U0104 Infiniti indicates Lost Communication With Advanced Driver Assistance Systems Control Module.
Common causes: Common causes include Faulty Advanced Driver Assistance Systems (ADAS) Control Module, Advanced Driver Assistance Systems Control Module harness is open or shorted, Advanced Driver Assistance Systems Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,465

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0104 Infiniti Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Advanced Driver Assistance Systems (ADAS) Control Module has not been received.

OBDII Code U0104 Infiniti - Lost Communication With Advanced Driver Assistance Systems Control Module - AutoCodes.com — U0104 Infiniti Code - Lost Communication With Advanced Driver Assistance Systems Control Module

What does this mean?

What are the Possible Causes of the DTC U0104 Infiniti?

Faulty Advanced Driver Assistance Systems (ADAS) Control Module
Advanced Driver Assistance Systems Control Module harness is open or shorted
Advanced Driver Assistance Systems Control Module circuit poor electrical connection

How to Fix the DTC U0104 Infiniti?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0104 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0104 Infiniti Code

What does the OBDII code U0104 mean for my Infiniti?

The OBDII code U0104 indicates that there is a lost communication issue with the Advanced Driver Assistance Systems (ADAS) control module, which may affect various safety and driver assistance features.

What are the common symptoms of the U0104 code?

Common symptoms include warning lights on the dashboard, malfunctioning driver assistance features (like adaptive cruise control or lane-keeping assist), and erratic behavior in electronic systems.

What could cause the U0104 code to trigger?

Causes may include a faulty ADAS control module, damaged wiring or connectors, issues with the vehicleâ€™s communication network, or even a dead or weak battery affecting system performance.

How can I diagnose the U0104 code?

To diagnose the U0104 code, check for other related trouble codes, inspect wiring and connectors for damage, and verify the functionality of the ADAS control module with a scan tool.

What are some common repairs for the U0104 code?

Common repairs include repairing or replacing damaged wiring and connectors, replacing a faulty ADAS control module, or reprogramming the module if necessary.

Can low battery voltage cause the U0104 code?

Yes, low battery voltage can lead to communication issues between modules, including the ADAS control module, which may trigger the U0104 code.

Is it safe to drive my vehicle with the U0104 code?

While the vehicle may be operable, driving with the U0104 code can compromise safety features. Itâ€™s advisable to have it diagnosed and repaired promptly.

Should I clear the code after repairs?

Yes, after making the necessary repairs, clear the code using an OBDII scanner to reset the system and check if the issue reoccurs.

Can I fix the U0104 code myself, or should I see a mechanic?

If you have experience with automotive diagnostics and repairs, you may attempt to fix it yourself. However, if youâ€™re unsure, itâ€™s best to consult a qualified mechanic for proper diagnosis and repair.