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Engine-Codes – Chrysler – U0404 Chrysler

U0404 Chrysler Code - Invalid Data Received From Gear Shift Control Module 'A'

Quick Answer

The U0404 diagnostic trouble code (DTC) for Chrysler vehicles indicates that the Engine Control Module (ECM) has detected invalid data from the Gear Shift Control Module 'A'. Common causes include Faulty Gear Shift Control Module, Loose or corroded wiring connections between ECM and Gear Shift Control Module, Software or firmware issues in the ECM or Gear Shift Control Module. 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
U0404 Chrysler indicates Invalid Data Received From Gear Shift Control Module 'A'.
Common causes
Common causes include Faulty Gear Shift Control Module, Loose or corroded wiring connections between ECM and Gear Shift Control Module, Software or firmware issues in the ECM or Gear Shift Control Module.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U0404 Chrysler Description

The U0404 diagnostic trouble code (DTC) for Chrysler vehicles indicates that the Engine Control Module (ECM) has detected invalid data from the Gear Shift Control Module 'A'. This means that there is a communication error between the ECM and the Gear Shift Control Module, which can impact the vehicle's performance and safety systems. The Gear Shift Control Module is responsible for managing the gear shifting process in automatic transmission vehicles, so any issues with this module can lead to erratic shifting, transmission problems, and potential safety hazards.

OBDII Code U0404 Chrysler - Invalid Data Received From Gear Shift Control Module 'A'
U0404 Chrysler Code - Invalid Data Received From Gear Shift Control Module 'A'

Common Causes of U0404 Chrysler

  1. Faulty Gear Shift Control Module
  2. Loose or corroded wiring connections between ECM and Gear Shift Control Module
  3. Software or firmware issues in the ECM or Gear Shift Control Module
  4. Electrical interference or signal disruption
  5. Vehicle collision or impact affecting the Gear Shift Control Module

Symptoms of U0404 Chrysler

  1. Erratic shifting or difficulty changing gears
  2. Transmission slipping or delayed engagement
  3. Illuminated Check Engine Light
  4. Loss of power or acceleration
  5. Vehicle going into limp mode

How to Fix U0404 Chrysler

  1. Perform a comprehensive diagnostic scan to confirm the U0404 code and identify any other related issues.
  2. Inspect and test the wiring connections between the ECM and Gear Shift Control Module for any faults or damage.
  3. Check and update the software/firmware of the ECM and Gear Shift Control Module as needed.
  4. Replace the Gear Shift Control Module if it is found to be faulty.
  5. Clear the DTCs and perform a test drive to ensure the issue has been resolved.

Cost to Fix U0404 Chrysler

The cost of repairing the U0404 code can vary depending on the specific cause of the issue. On average, the repair costs for this type of problem can range from $200 to $800, including parts and labor. However, it is important to note that labor rates and diagnostic fees can vary between different auto repair shops, so it is recommended to obtain quotes from multiple sources to get an accurate estimate for your specific vehicle.

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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 U0404 Chrysler Code

1. What are the common symptoms of OBDII code U0404 in a Chrysler vehicle?

The common symptoms include issues with shifting gears, erratic behavior of the transmission, warning lights illuminated on the dashboard, and possible stalling or hesitation during acceleration.

2. What does the OBDII code U0404 Chrysler mean?

The code U0404 indicates that the vehicle's Engine Control Module (ECM) has detected invalid data from the Gear Shift Control Module 'A', which is responsible for monitoring and controlling the gear shifting process.

3. What are the possible causes of OBDII code U0404 in a Chrysler vehicle?

Potential causes of code U0404 include a faulty gear shift control module, wiring or connection issues, software glitches, low battery voltage, or a malfunctioning ECM.

4. How can I diagnose OBDII code U0404 in my Chrysler vehicle?

Diagnosing code U0404 typically involves using a professional OBDII scanner to retrieve the code, checking for any other related trouble codes, inspecting the wiring and connectors, and performing a thorough system test of the gear shift control module.

5. How serious is OBDII code U0404 in a Chrysler vehicle?

Code U0404 should be addressed promptly as it can lead to transmission issues, potential safety hazards, and further damage to the vehicle if left unresolved. It is recommended to have the vehicle inspected by a qualified mechanic as soon as possible.

6. Can I continue driving my Chrysler vehicle with OBDII code U0404?

It is not advisable to continue driving the vehicle with code U0404 present, as it may result in unpredictable behavior of the transmission system and could potentially lead to more significant problems. It is best to have the issue diagnosed and repaired promptly.

7. How can OBDII code U0404 in a Chrysler vehicle be repaired?

Repairing code U0404 may involve replacing the gear shift control module, repairing any damaged wiring or connectors, updating software if necessary, or resetting the ECM. It is recommended to have a professional technician perform the repair.

8. Can a DIY enthusiast fix OBDII code U0404 in a Chrysler vehicle?

While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing code U0404 may require specialized tools, technical knowledge, and expertise. It is recommended to seek assistance from a qualified mechanic for proper diagnosis and repair.

9. How much does it cost to repair OBDII code U0404 in a Chrysler vehicle?

The cost of repairing code U0404 can vary depending on the specific issue causing the code, the labor rates in your area, and the cost of parts needed for the repair. It is advisable to obtain estimates from local repair shops for an accurate cost assessment.

10. Can resetting the ECM clear OBDII code U0404 in a Chrysler vehicle?

Resetting the ECM may temporarily clear the code U0404, but if the underlying issue causing the code is not addressed, the code is likely to reappear. It is crucial to diagnose the root cause of the problem and perform the necessary repairs to prevent the code from returning.

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