AutoCodes – RAM – U1508 RAM

U1508 RAM Code - Implausible Message Data Length Received From ESM

Quick Answer

The messages sent on the Controller Area Network (CAN) bus are distinguished by an Identifier (ID). Common causes include Faulty Electronic Shift Module (ESM), Electronic Shift Module harness is open or shorted, Electronic Shift 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: U1508 RAM indicates Implausible Message Data Length Received From ESM.
Common causes: Common causes include Faulty Electronic Shift Module (ESM), Electronic Shift Module harness is open or shorted, Electronic Shift 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 869

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 U1508 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. The Diagnostic Trouble Code (DTC) will set when the TCM detects an incorrect CAN ID from the Electronic Shift Module (ESM).

OBDII Code U1508 RAM - Implausible Message Data Length Received From ESM - AutoCodes.com — U1508 RAM Code - Implausible Message Data Length Received From ESM

What does this mean?

What are the Possible Causes of the DTC U1508 RAM?

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

How to Fix the DTC U1508 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 U1508 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 U1508 RAM Code

1. What are the common symptoms of OBDII code U1508 RAM?

The common symptoms of U1508 RAM include issues with the electronic shifter module (ESM), such as difficulty shifting gears or the gear indicator not displaying correctly.

2. What can cause the OBDII code U1508 RAM to trigger?

The U1508 RAM code is typically triggered when the Body Control Module (BCM) detects an implausible message data length received from the Electronic Shifter Module (ESM).

3. How can I diagnose the U1508 RAM code?

Diagnosing the U1508 RAM code involves using a professional OBDII scanner to retrieve the specific fault codes stored in the BCM and ESM modules. Additionally, checking the wiring connections between the modules is recommended.

4. What are some potential repair tips for resolving the U1508 RAM code?

Repair tips for U1508 RAM may include checking and repairing any damaged wiring connections, ensuring the ESM is properly connected and functioning, and updating the software in the BCM and ESM modules.

5. Can I drive my vehicle with the U1508 RAM code present?

It is not recommended to drive your vehicle with the U1508 RAM code present, as it can lead to further transmission or shifting issues. It is best to address the problem promptly to prevent any safety hazards.

6. How serious is the U1508 RAM code?

While the U1508 RAM code may not directly affect the drivability of your vehicle, ignoring it can lead to potential transmission problems and safety concerns. It is important to address this code promptly.

7. Is the U1508 RAM code a common issue in certain vehicle models?

The U1508 RAM code is more commonly seen in certain Chrysler, Dodge, and Jeep vehicles that are equipped with electronic shifter modules and Body Control Modules.

8. Can resetting the codes clear the U1508 RAM code permanently?

Resetting the fault codes may temporarily clear the U1508 RAM code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

9. Are there any recalls related to the U1508 RAM code?

Recalls related to the U1508 RAM code may vary depending on the vehicle make and model. It is recommended to check with the manufacturer or a qualified dealership for any related recalls.

10. How much does it typically cost to repair the U1508 RAM code?

The cost of repairing the U1508 RAM code can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to get a diagnostic inspection to determine the exact cost.