AutoCodes – Infiniti – U0402 Infiniti

U0402 Infiniti Code - Invalid Data Received From Transmission 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 Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission 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: U0402 Infiniti indicates Invalid Data Received From Transmission Control Module.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission 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 863

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 U0402 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 Transmission Control Module (TCM) causing its integrity to be questioned.

OBDII Code U0402 Infiniti - Invalid Data Received From Transmission Control Module - AutoCodes.com — U0402 Infiniti Code - Invalid Data Received From Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U0402 Infiniti?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC U0402 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 U0402 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 U0402 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 U0402 Infiniti Code

1. What are the common symptoms of OBDII code U0402 in an Infiniti?

- Common symptoms include transmission shifting issues, hesitation or jerking during acceleration, and possibly the vehicle going into limp mode.

2. What causes the OBDII code U0402 in an Infiniti?

- The U0402 code is typically triggered when the Engine Control Module (ECM) receives invalid data from the Transmission Control Module (TCM). This can be due to wiring issues, a faulty TCM, or a communication error between the modules.

3. How can I diagnose the OBDII code U0402 in my Infiniti?

- Diagnosing the U0402 code requires a professional OBDII scanner to retrieve the code and check for any other related codes. A thorough inspection of the TCM, wiring, and connections is also necessary.

4. Can I drive my Infiniti with the U0402 code?

- It is not recommended to drive your vehicle with the U0402 code present, as it can lead to further transmission damage or safety hazards. It is best to address the issue promptly.

5. How do I repair the OBDII code U0402 in my Infiniti?

- Repairing the U0402 code may involve fixing any wiring issues, replacing a faulty TCM, updating software, or resetting the communication between the ECM and TCM. It is advisable to consult a qualified mechanic for proper diagnosis and repair.

6. Is the U0402 code a serious issue in an Infiniti?

- The U0402 code should not be ignored, as it can affect the performance and safety of your vehicle. It is important to address the underlying cause promptly to prevent further damage.

7. Can a DIY enthusiast fix the U0402 code in an Infiniti?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the U0402 code may require advanced tools and expertise. It is recommended to seek professional help for accurate diagnosis and repair.

8. How much does it cost to fix the U0402 code in an Infiniti?

- The cost of fixing the U0402 code can vary depending on the cause of the issue and the necessary repairs. It is advisable to get a diagnostic from a mechanic to determine the exact cost.

9. Will resetting the trouble codes clear the U0402 code in my Infiniti?

- Resetting the trouble codes may temporarily clear the U0402 code, but if the underlying issue is not addressed, the code is likely to reappear. It is crucial to diagnose and repair the root cause of the problem.

10. Can extreme weather conditions trigger the U0402 code in an Infiniti?

- Extreme weather conditions can sometimes lead to electrical issues that may trigger the U0402 code. Ensure that all connections and wiring are secure and protected from environmental factors to prevent such occurrences.