AutoCodes – Dodge – U0402 Dodge

U0402 Dodge 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 Dodge 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 6,410

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 Aug 05, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0402 Dodge 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 Dodge - Invalid Data Received From Transmission Control Module - AutoCodes.com — U0402 Dodge Code - Invalid Data Received From Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U0402 Dodge?

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

How to Fix the DTC U0402 Dodge?

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 Dodge 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 U0402 Dodge Code

1. What are the common symptoms of OBDII code U0402 in a Dodge vehicle?

- Common symptoms include issues with shifting gears, erratic transmission behavior, and the illumination of the check engine light.

2. What does the OBDII code U0402 indicating "Invalid Data Received From Transmission Control Module" mean for my Dodge?

- This code suggests that the Engine Control Module (ECM) has detected a communication problem with the Transmission Control Module (TCM).

3. What are some possible causes of the U0402 code in a Dodge?

- Possible causes include faulty wiring or connectors, a malfunctioning TCM, a software issue, or a communication network problem.

4. How can I diagnose the U0402 code on my Dodge?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking for other related codes, inspecting wiring and connectors, and testing the TCM.

5. Can I continue driving my Dodge with the U0402 code present?

- It is not recommended to drive your vehicle with this code unresolved, as it can lead to further transmission issues and potential safety hazards.

6. How can I repair the U0402 code in my Dodge?

- Repair may involve fixing any wiring or connector issues, replacing the TCM if necessary, updating software, or addressing any network communication problems.

7. Is it possible to clear the U0402 code on my Dodge without fixing the underlying issue?

- Clearing the code without addressing the root cause is not recommended, as the problem may recur, leading to continued transmission problems.

8. Can a DIY enthusiast fix the U0402 code issue in a Dodge?

- Depending on your skill level and access to tools, some basic troubleshooting like checking connectors and wiring can be done, but complex repairs may require professional assistance.

9. How long does it typically take to repair the U0402 code in a Dodge?

- The repair time can vary based on the specific cause of the code. Simple fixes like connector cleaning may take less time, while TCM replacement could be more time-consuming.

10. Will fixing the U0402 code on my Dodge be costly?

- The cost of repairing the U0402 code can vary depending on the exact cause, parts needed, and labor rates. It is advisable to get a diagnosis to determine the exact cost.