AutoCodes – RAM – U1501 RAM

U1501 RAM Code - Implausible Message Data Length Received From ECM/PCM

Quick Answer

The Diagnostic Trouble Code (DTC) will set if the Anti-Lock Brakes (ABS) Module detects bus messages from the Engine Control Module (ECM) or Powertrain Control Module (PCM) are of improper data length. Common causes include Faulty Engine Control Module (ECM) or Powertrain Control Module (PCM), Engine Control Module or Powertrain Control Module harness is open or shorted, Engine Control Module or Powertrain 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: U1501 RAM indicates Implausible Message Data Length Received From ECM/PCM.
Common causes: Common causes include Faulty Engine Control Module (ECM) or Powertrain Control Module (PCM), Engine Control Module or Powertrain Control Module harness is open or shorted, Engine Control Module or Powertrain 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 677

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code U1501 RAM Description

OBDII Code U1501 RAM - Implausible Message Data Length Received From ECM/PCM - AutoCodes.com — U1501 RAM Code - Implausible Message Data Length Received From ECM/PCM

What does this mean?

What are the Possible Causes of the DTC U1501 RAM?

Faulty Engine Control Module (ECM) or Powertrain Control Module (PCM)
Engine Control Module or Powertrain Control Module harness is open or shorted
Engine Control Module or Powertrain Control Module circuit poor electrical connection
Faulty Anti-Lock Brakes (ABS) Module

How to Fix the DTC U1501 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 U1501 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 U1501 RAM Code

1. What are the common symptoms of OBDII code U1501 RAM?

The common symptoms of code U1501 RAM include issues with shifting gears, poor fuel efficiency, and the vehicle going into limp mode.

2. What causes the OBDII code U1501 RAM to trigger?

The code U1501 RAM is triggered when the Engine Control Module/Powertrain Control Module (ECM/PCM) detects an implausible message data length coming from the ECM/PCM.

3. How does an implausible message data length affect vehicle performance?

An implausible message data length can disrupt communication between various control modules in the vehicle, leading to erratic behavior and performance issues.

4. What are some potential repair tips for resolving code U1501 RAM?

Some repair tips for resolving code U1501 RAM include checking and repairing any damaged wiring or connectors, ensuring all control modules are properly connected, and updating the ECM/PCM software.

5. Can a DIY mechanic fix the OBDII code U1501 RAM at home?

While some basic troubleshooting steps can be performed at home, diagnosing and repairing code U1501 RAM often requires specialized diagnostic equipment and expertise, making it best suited for a professional mechanic.

6. Is it safe to continue driving with the OBDII code U1501 RAM present?

It is not recommended to continue driving with the code U1501 RAM present, as it can lead to further damage to the vehicle and potential safety hazards.

7. How can I prevent the OBDII code U1501 RAM from recurring?

To prevent the code U1501 RAM from recurring, regular maintenance and inspections of the vehicle's electrical system and control modules are essential.

8. Can a faulty ECM/PCM cause the OBDII code U1501 RAM?

Yes, a faulty ECM/PCM can cause the OBDII code U1501 RAM to trigger, as it may send incorrect or implausible data lengths to other control modules in the vehicle.

9. What is the typical cost to repair the OBDII code U1501 RAM?

The cost to repair the OBDII code U1501 RAM can vary depending on the underlying cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. How long does it take to diagnose and repair the OBDII code U1501 RAM?

The time to diagnose and repair the OBDII code U1501 RAM can vary based on the complexity of the issue and the availability of parts, but it may take anywhere from a few hours to a few days to complete the repair.