AutoCodes – Chrysler – U0402 Chrysler

U0402 Chrysler 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 Chrysler 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 6,256

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

What does this mean?

What are the Possible Causes of the DTC U0402 Chrysler?

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 Chrysler?

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 Chrysler 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 Chrysler Code

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

- Common symptoms include transmission shifting issues, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code U0402 Chrysler mean?

- The code U0402 indicates that the engine control module (ECM) has detected invalid data communication from the transmission control module (TCM).

3. What are the potential causes of the U0402 code in a Chrysler vehicle?

- Possible causes include a faulty transmission control module, wiring or connection issues between the ECM and TCM, or a malfunction in the CAN bus communication network.

4. How can I diagnose the U0402 code in my Chrysler vehicle?

- Diagnosing the U0402 code usually involves using a professional OBDII scanner to retrieve the specific fault codes, checking the transmission control module for any visible damage, and inspecting the wiring harness for any signs of wear or corrosion.

5. Can I still drive my Chrysler vehicle with the U0402 code present?

- It is not recommended to drive the vehicle with the U0402 code active, as it can lead to further damage to the transmission system and potentially compromise vehicle safety.

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

- Repairing the U0402 code may involve repairing or replacing the transmission control module, addressing any wiring issues, or reprogramming the control modules to ensure proper communication.

7. Are there any DIY tips for resolving the U0402 code in a Chrysler vehicle?

- DIY tips include checking and securing all connections related to the transmission control module, inspecting the wiring harness for damage, and clearing the fault codes with an OBDII scanner.

8. How much does it typically cost to repair the U0402 code in a Chrysler vehicle?

- The cost of repairing the U0402 code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can the U0402 code be a recurring issue in Chrysler vehicles?

- Yes, the U0402 code can be a recurring issue if the root cause, such as poor connections or a faulty transmission control module, is not properly addressed during the repair process.

10. Is it necessary to reset the ECM after repairing the U0402 code in a Chrysler vehicle?

- Yes, it is recommended to reset the ECM after repairing the U0402 code to clear any stored fault codes and ensure that the system operates correctly.