AutoCodes – Infiniti – U0401 Infiniti

U0401 Infiniti Code - Invalid Data Received From Engine 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 Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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: U0401 Infiniti indicates Invalid Data Received From Engine Control Module.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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 728

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0401 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. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Engine Control Module (ECM) causing its integrity to be questioned.

OBDII Code U0401 Infiniti - Invalid Data Received From Engine Control Module - AutoCodes.com — U0401 Infiniti Code - Invalid Data Received From Engine Control Module

What does this mean?

What are the Possible Causes of the DTC U0401 Infiniti?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC U0401 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 U0401 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.

Need more information about the U0401 Infiniti code?

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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 U0401 Infiniti Code

1. What are the common symptoms of OBDII code U0401 in an Infiniti?

- Common symptoms include the check engine light coming on, issues with engine performance such as rough idling or stalling, and potential transmission problems.

2. What causes the OBDII code U0401 in an Infiniti?

- This code is typically triggered when the Engine Control Module (ECM) receives invalid data from another control module, such as the Transmission Control Module (TCM) or Body Control Module (BCM).

3. How can I diagnose the OBDII code U0401 in my Infiniti?

- Diagnosis involves using a diagnostic scanner to retrieve the specific codes stored in the ECM, followed by testing the communication between various control modules to pinpoint the source of the issue.

4. Can a bad electrical connection cause the U0401 code in an Infiniti?

- Yes, poor electrical connections, corroded wiring, or damaged connectors between control modules can lead to communication errors and trigger the U0401 code.

5. What are some repair tips for resolving the U0401 code in an Infiniti?

- Start by checking and repairing any damaged wiring or connectors, ensuring all control modules are properly connected and functioning, and resetting the ECM to see if the code reappears.

6. Is it safe to continue driving with the U0401 code in an Infiniti?

- It is not recommended to drive with the U0401 code present, as it can lead to potential engine or transmission issues, and may result in further damage if left unresolved.

7. Can a software update fix the U0401 code in an Infiniti?

- In some cases, a software update from the manufacturer may address communication issues between control modules and resolve the U0401 code without the need for extensive repairs.

8. How much does it typically cost to repair the U0401 code in an Infiniti?

- The cost of repairing the U0401 code can vary depending on the underlying cause, but it may range from a simple wiring repair costing a few hundred dollars to more complex module replacements costing upwards of a thousand dollars.

9. Will disconnecting the battery reset the U0401 code in an Infiniti?

- Disconnecting the battery may temporarily clear the code, but it is not a permanent solution. It is important to diagnose and address the root cause of the issue to prevent the code from reappearing.

10. Can a mechanic help me diagnose and repair the U0401 code in my Infiniti?

- Yes, a qualified mechanic with experience in diagnosing OBDII codes can assist in identifying the source of the U0401 code and performing the necessary repairs to resolve the issue effectively.