AutoCodes – Nissan – U0401 Nissan

U0401 Nissan 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 Nissan 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 4,423

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

What does this mean?

What are the Possible Causes of the DTC U0401 Nissan?

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 Nissan?

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 Nissan 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 U0401 Nissan Code

What does the OBDII code U0401 mean for my Nissan?

U0401 indicates that the vehicle's computer has received invalid data from the Engine Control Module (ECM). This can affect engine performance and diagnostics.

What are common symptoms of the U0401 code?

Common symptoms include the check engine light being illuminated, poor engine performance, erratic transmission shifting, and potential stalling issues.

What could cause the U0401 code to trigger in my Nissan?

Causes may include a faulty Engine Control Module, poor wiring or connections in the data circuit, or issues with other modules that communicate with the ECM.

Can I drive my Nissan with the U0401 code?

While it may be possible to drive, it's not recommended as it can lead to reduced performance and potential further damage to the vehicle.

How can I diagnose the U0401 code?

Start by using an OBDII scanner to confirm the code. Then inspect wiring and connectors related to the ECM, check for other related codes, and test the ECM for proper function.

What repairs are typically needed to fix the U0401 code?

Repairs may involve fixing wiring issues, replacing faulty connectors, or in some cases, replacing the Engine Control Module itself.

Is U0401 a serious code that requires immediate attention?

Yes, it can indicate a serious issue with data communication, which may affect vehicle performance and safety, so it should be addressed promptly.

Will clearing the U0401 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but it wonâ€™t fix the underlying issue; the code will likely return if the problem persists.

How much does it typically cost to repair the U0401 code?

Repair costs can vary widely based on the cause; simple wiring fixes may be inexpensive, while replacing an ECM can be more costly, potentially ranging from $100 to over $1,000.

Should I take my Nissan to a dealer for U0401 code issues?

While a dealer may have specialized knowledge, a qualified independent mechanic can also effectively diagnose and repair the issue, often at a lower cost.