AutoCodes – RAM – U1505 RAM

U1505 RAM Code - Implausible Message Data Length Received From FDCM

Quick Answer

The messages sent on the Controller Area Network (CAN) bus are distinguished by an Identifier (ID). 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: U1505 RAM indicates Implausible Message Data Length Received From FDCM.
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 922

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 May 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1505 RAM Description

The messages sent on the Controller Area Network (CAN) bus are distinguished by an Identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Transmission Control Module (TCM) verifies that it has received the proper number of bytes for each ID.

OBDII Code U1505 RAM - Implausible Message Data Length Received From FDCM - AutoCodes.com — U1505 RAM Code - Implausible Message Data Length Received From FDCM

What does this mean?

What are the Possible Causes of the DTC U1505 RAM?

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

How to Fix the DTC U1505 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 U1505 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 U1505 RAM Code

1. What are the common symptoms of OBDII code U1505 RAM?

- Common symptoms of code U1505 RAM may include issues with the Four-Wheel Drive Control Module (FDCM), warning lights on the dashboard, and limited functionality of the 4WD system.

2. What could cause the OBDII code U1505 RAM to trigger?

- The U1505 code is triggered when the Powertrain Control Module (PCM) detects an implausible message data length received from the Four-Wheel Drive Control Module (FDCM).

3. How serious is the U1505 RAM code in a vehicle?

- The U1505 code can affect the proper operation of the Four-Wheel Drive system in the vehicle, potentially leading to issues with traction and stability in certain driving conditions.

4. What are some possible repair tips for fixing the U1505 RAM code?

- Repair tips may include checking the wiring and connectors between the PCM and FDCM, ensuring proper voltage supply to the modules, and reprogramming or replacing the FDCM if necessary.

5. Can I drive my vehicle with the U1505 RAM code present?

- It is not recommended to drive the vehicle with the U1505 code present, as it can impact the performance and safety of the Four-Wheel Drive system.

6. How can I diagnose the U1505 RAM code in my vehicle?

- Diagnosing the U1505 code typically involves using a diagnostic scanner to retrieve the code, checking for other related codes, and performing a thorough inspection of the 4WD system components.

7. Is the U1505 RAM code a common issue in certain vehicle makes and models?

- The U1505 code may be more common in vehicles equipped with Four-Wheel Drive systems and specific models that use similar PCM and FDCM configurations.

8. Can resetting the PCM clear the U1505 RAM code?

- Resetting the PCM may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. Are there any recalls related to the U1505 RAM code?

- It is recommended to check with the vehicle manufacturer or a dealership to see if there are any recalls related to the U1505 code for your specific vehicle make and model.

10. How much does it typically cost to repair the U1505 RAM code?

- The cost of repairing the U1505 code can vary depending on the underlying issue, but it may involve replacement parts, labor costs, and diagnostic fees.