AutoCodes – RAM – U0404 RAM

U0404 RAM 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 RAM 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 822

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

What does this mean?

What are the Possible Causes of the DTC U0404 RAM?

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 RAM?

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 RAM 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 RAM Code

1. What are common symptoms of OBDII code U0404 related to the Gear Shift Control Module 'A'?

Symptoms may include issues with shifting gears, transmission not engaging properly, warning lights on the dashboard, and the vehicle going into limp mode.

2. What are possible causes of OBDII code U0404 indicating Invalid Data Received from Gear Shift Control Module 'A'?

Possible causes include a faulty gear shift control module, wiring issues, communication errors between modules, or a malfunction in the transmission system.

3. How can I diagnose the cause of OBDII code U0404 related to the Gear Shift Control Module 'A'?

Diagnosis typically involves using an OBDII scanner to retrieve the code, checking for any other related codes, inspecting the gear shift control module and its wiring, and testing communication between modules.

4. What are some repair tips for fixing OBDII code U0404 associated with the Gear Shift Control Module 'A'?

Repair tips may include checking and repairing any damaged wiring, replacing the gear shift control module if necessary, ensuring proper communication between modules, and clearing the code after repairs.

5. Can OBDII code U0404 related to the Gear Shift Control Module 'A' be fixed without professional help?

Depending on your experience and access to tools, you may be able to fix the issue yourself by following repair guides or seeking assistance from automotive forums. However, it's recommended to consult a professional if unsure.

6. How urgent is it to address OBDII code U0404 indicating Invalid Data Received from Gear Shift Control Module 'A'?

It is important to address this code promptly to prevent potential transmission issues and further damage to the vehicle. Ignoring the problem may lead to safety hazards and more costly repairs in the future.

7. Are there any recalls or technical service bulletins related to OBDII code U0404 and the Gear Shift Control Module 'A'?

It's advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins addressing this specific OBDII code and module issue.

8. Can a low battery voltage cause OBDII code U0404 to trigger in relation to the Gear Shift Control Module 'A'?

Low battery voltage can sometimes lead to communication errors between modules, including the gear shift control module, which may trigger the U0404 code. Ensuring a properly charged battery is a good initial troubleshooting step.

9. Is it safe to continue driving with OBDII code U0404 related to the Gear Shift Control Module 'A' present?

It's generally not recommended to continue driving with this code active, as it may indicate underlying transmission or control module issues that can affect the vehicle's performance and safety.

10. How much can I expect to pay for repairs related to OBDII code U0404 and the Gear Shift Control Module 'A' at a repair shop?

The cost of repairs can vary depending on the specific cause of the issue, the labor rates of the repair shop, and any parts that need to be replaced. It's advisable to obtain multiple quotes from reputable shops for an accurate estimate.