AutoCodes – Chrysler – U0404 Chrysler

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

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 Gear Shift Control Module 'A', Gear Shift Control Module 'A' harness is open or shorted, Gear Shift Control Module 'A' 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: U0404 Chrysler indicates Invalid Data Received From Gear Shift Control Module 'A'.
Common causes: Common causes include Faulty Gear Shift Control Module 'A', Gear Shift Control Module 'A' harness is open or shorted, Gear Shift Control Module 'A' 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 1,324

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0404 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 Gear Shift Control Module 'A' causing its integrity to be questioned.

OBDII Code U0404 Chrysler - Invalid Data Received From Gear Shift Control Module 'A' - AutoCodes.com — U0404 Chrysler Code - Invalid Data Received From Gear Shift Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U0404 Chrysler?

Faulty Gear Shift Control Module 'A'
Gear Shift Control Module 'A' harness is open or shorted
Gear Shift Control Module 'A' circuit poor electrical connection

How to Fix the DTC U0404 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 U0404 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 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.