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U1502 Dodge Code - Implausible Message Data Length Received From TCM

Quick Answer

The U1502 code for Dodge vehicles indicates that there is an issue with the data length received from the Transmission Control Module (TCM) that is deemed implausible. Common causes include Faulty wiring or connectors between the TCM and ECM, Malfunctioning TCM, Software communication errors between the TCM and ECM. 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
U1502 Dodge indicates Implausible Message Data Length Received From TCM.
Common causes
Common causes include Faulty wiring or connectors between the TCM and ECM, Malfunctioning TCM, Software communication errors between the TCM and ECM.
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 19, 2024
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Code U1502 Dodge Description

The U1502 code for Dodge vehicles indicates that there is an issue with the data length received from the Transmission Control Module (TCM) that is deemed implausible. The TCM is responsible for controlling the transmission functions in the vehicle, such as shifting gears and managing torque converter lockup. When the Engine Control Module (ECM) receives data from the TCM that has an incorrect or unexpected length, it triggers the U1502 code.

OBDII Code U1502 Dodge - Implausible Message Data Length Received From TCM
U1502 Dodge Code - Implausible Message Data Length Received From TCM

Common Causes of U1502 Dodge

  1. Faulty wiring or connectors between the TCM and ECM
  2. Malfunctioning TCM
  3. Software communication errors between the TCM and ECM
  4. Corrosion or damage to the wiring harness
  5. Electrical interference or signal disruption

Symptoms of U1502 Dodge

  1. Erratic shifting behavior
  2. Harsh engagements when shifting gears
  3. Transmission slipping
  4. Decreased fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix U1502 Dodge

  1. Begin by using a diagnostic scanner to retrieve the specific details of the U1502 code and any related codes.
  2. Inspect the wiring and connectors between the TCM and ECM for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Perform a thorough inspection of the TCM and ECM for any visible damage or signs of malfunction. Replace the faulty module if needed.
  4. Check for any software updates or reprogramming that may be available for the TCM and ECM to address communication errors.
  5. Clear the code from the vehicle's computer memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix U1502 Dodge

The typical repair costs for addressing the U1502 code can vary depending on the specific cause of the issue. In general, the cost of parts for replacing wiring, connectors, or modules can range from $100 to $500. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total cost of repairs for this issue could range from $200 to $800 or more, depending on the extent of the repairs needed. It is advisable to consult with a qualified mechanic or dealership to get an accurate estimate based on the specific circumstances of your vehicle.

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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 U1502 Dodge Code

1. What are the common symptoms of OBDII code U1502 in a Dodge vehicle?

- Common symptoms include erratic shifting behavior, transmission issues, and possible warning lights on the dashboard.

2. What can cause the U1502 code to trigger in a Dodge vehicle?

- The U1502 code is typically triggered by a communication error between the Transmission Control Module (TCM) and other control modules in the vehicle.

3. How can I diagnose the U1502 code in my Dodge vehicle?

- Diagnosis involves using a professional OBDII scanner to retrieve the specific code, checking for other related codes, and inspecting the TCM and related wiring for any signs of damage.

4. Can a loose or damaged wiring harness cause the U1502 code in a Dodge?

- Yes, a loose or damaged wiring harness connecting the TCM to other modules can cause the U1502 code due to poor communication.

5. What are some repair tips for addressing the U1502 code in a Dodge vehicle?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections, resetting the code, and performing a test drive to confirm the issue is resolved.

6. Is it safe to continue driving with the U1502 code present in a Dodge?

- It is generally not recommended to continue driving with the U1502 code present, as it can lead to further transmission issues and potential safety risks.

7. Can a software update fix the U1502 code in a Dodge vehicle?

- In some cases, a software update from the dealership or a qualified technician may help resolve the communication error causing the U1502 code.

8. How long does it typically take to repair the U1502 code in a Dodge?

- The repair time can vary depending on the underlying cause of the code, but it may take anywhere from a few hours to a full day to diagnose and address the issue.

9. Will resetting the U1502 code make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U1502 code is not fixed, it is likely to return.

10. Can a DIY enthusiast fix the U1502 code in a Dodge, or is professional help necessary?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, resolving the U1502 code may require advanced diagnostic tools and expertise, so professional help is often recommended.

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