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U1508 RAM Code - Implausible Message Data Length Received From ESM

Quick Answer

The U1508 RAM code indicates that an implausible message data length has been received from the Electronic Shift Module (ESM) in the vehicle. Common causes include Faulty wiring or connections, Malfunctioning sensors, Software glitches in the control modules. 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 wiring or connections, Malfunctioning sensors, Software glitches in the control modules.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code U1508 RAM Description

The U1508 RAM code indicates that an implausible message data length has been received from the Electronic Shift Module (ESM) in the vehicle. The ESM is responsible for controlling the shifting of the vehicle's transmission, so any issues with communication between the ESM and other modules can have a significant impact on the vehicle's performance. This communication error can lead to incorrect shifting patterns, erratic transmission behavior, and potential safety concerns while driving.

OBDII Code U1508 RAM - Implausible Message Data Length Received From ESM
U1508 RAM Code - Implausible Message Data Length Received From ESM

Common Causes of U1508 RAM

  1. Faulty wiring or connections
  2. Malfunctioning sensors
  3. Software glitches in the control modules
  4. Defective Electronic Shift Module (ESM)
  5. Communication network issues within the vehicle's system

Symptoms of U1508 RAM

  1. Erratic shifting behavior
  2. Transmission slipping
  3. Delayed or harsh shifting
  4. Illuminated Check Engine Light
  5. Limited or no acceleration

How to Fix U1508 RAM

  1. Perform a comprehensive diagnostic scan to identify the specific cause of the communication error.
  2. Inspect the wiring and connections related to the ESM to check for any damage or loose connections.
  3. Test and potentially replace any faulty sensors that may be contributing to the issue.
  4. Update or reprogram the software in the control modules to address any glitches or bugs.
  5. If necessary, replace the Electronic Shift Module (ESM) to resolve the communication error.

Cost to Fix U1508 RAM

The cost of repairing the U1508 RAM code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $200 to $800, with labor costs adding an additional $100 to $300. Overall, the total repair cost for addressing this code typically falls within the range of $300 to $1100. It's important to note that these are rough estimates, and actual costs can vary based on location, vehicle make and model, and the specific repair shop. Be sure to consult with a qualified mechanic for a more accurate cost estimate.

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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.

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