AutoCodes – RAM – U1503 RAM

U1503 RAM Code - Implausible Message Data Length Received From FCM

Quick Answer

The Diagnostic Trouble Code (DTC) will set when the Anti-Lock Brake Module detects an incorrect Controller Area Network (CAN) message from the Totally Integrated Power Module (TIPM). Common causes include Faulty Totally Integrated Power Module (TIPM), Totally Integrated Power Module harness is open or shorted, Totally Integrated Power 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: U1503 RAM indicates Implausible Message Data Length Received From FCM.
Common causes: Common causes include Faulty Totally Integrated Power Module (TIPM), Totally Integrated Power Module harness is open or shorted, Totally Integrated Power 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 496

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 U1503 RAM Description

The Diagnostic Trouble Code (DTC) will set when the Anti-Lock Brake Module detects an incorrect Controller Area Network (CAN) message from the Totally Integrated Power Module (TIPM).

OBDII Code U1503 RAM - Implausible Message Data Length Received From FCM - AutoCodes.com — U1503 RAM Code - Implausible Message Data Length Received From FCM

What does this mean?

What are the Possible Causes of the DTC U1503 RAM?

Faulty Totally Integrated Power Module (TIPM)
Totally Integrated Power Module harness is open or shorted
Totally Integrated Power Module circuit poor electrical connection
Faulty Anti-Lock Brakes (ABS) Module

How to Fix the DTC U1503 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 U1503 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.

Need more information about the U1503 RAM code?

Need more information on how to fix the U1503 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1503 RAM code diagnosed by a professional: Find a repair shop in your area

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 U1503 RAM Code

1. What are the common symptoms of OBDII code U1503 RAM?

The common symptoms of U1503 RAM include erratic behavior of various vehicle systems, such as the transmission, engine, and electronic stability control.

2. What are some possible causes of the U1503 RAM code?

Possible causes of the U1503 RAM code include a faulty communication module, wiring issues, software glitches, or a defective Body Control Module (BCM).

3. How can I diagnose the U1503 RAM code?

Diagnosing the U1503 RAM code involves using a professional OBDII scanner to retrieve the specific details of the code and performing a thorough inspection of the communication systems in the vehicle.

4. Can I drive my vehicle with the U1503 RAM code present?

It is not recommended to drive the vehicle with the U1503 RAM code present, as it can lead to further electrical issues and potentially affect the overall performance and safety of the vehicle.

5. How can I repair the U1503 RAM code?

Repairing the U1503 RAM code may involve resetting the codes with a scanner, checking and repairing any wiring issues, replacing the communication module, or reprogramming the BCM.

6. Is the U1503 RAM code a serious issue?

The U1503 RAM code should be addressed promptly to prevent any potential damage to the vehicle's electrical system and ensure the proper functioning of various systems.

7. Can a DIY enthusiast fix the U1503 RAM code?

While some basic diagnostics and repairs can be done by a DIY enthusiast, addressing the U1503 RAM code may require specialized tools and expertise, so it is advisable to consult a professional mechanic.

8. How much does it cost to repair the U1503 RAM code?

The cost of repairing the U1503 RAM code can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed.

9. Will resetting the U1503 RAM code make it go away permanently?

Simply resetting the U1503 RAM code may temporarily clear the issue, but if the underlying problem is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the code.

10. How long does it take to repair the U1503 RAM code?

The time needed to repair the U1503 RAM code can vary depending on the complexity of the issue, the availability of parts, and the expertise of the mechanic. It is advisable to consult with a professional for an accurate estimate of the repair time.