Engine-Codes.com
Engine-Codes – RAM – U0103 RAM

U0103 RAM Code - Lost Communication With Electric Gear Shift Module

Quick Answer

The U0103 diagnostic trouble code (DTC) indicates that there is a communication problem between the vehicle's Engine Control Module (ECM) and the Electric Gear Shift Module. Common causes include Faulty wiring or connections between the ECM and Electric Gear Shift Module, A malfunctioning Electric Gear Shift Module, Software issues or communication protocols not being followed correctly. 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
U0103 RAM indicates Lost Communication With Electric Gear Shift Module.
Common causes
Common causes include Faulty wiring or connections between the ECM and Electric Gear Shift Module, A malfunctioning Electric Gear Shift Module, Software issues or communication protocols not being followed correctly.
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 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U0103 RAM Description

The U0103 diagnostic trouble code (DTC) indicates that there is a communication problem between the vehicle's Engine Control Module (ECM) and the Electric Gear Shift Module. This module is responsible for controlling the shifting of gears in vehicles equipped with automatic transmissions. When communication is lost between these two modules, it can lead to issues with gear shifting, potentially causing the vehicle to stall or not shift correctly.

OBDII Code U0103 RAM - Lost Communication With Electric Gear Shift Module
U0103 RAM Code - Lost Communication With Electric Gear Shift Module

Common Causes of U0103 RAM

  1. Faulty wiring or connections between the ECM and Electric Gear Shift Module
  2. A malfunctioning Electric Gear Shift Module
  3. Software issues or communication protocols not being followed correctly
  4. Corrosion or damage to the wiring harness
  5. Electrical interference or other external factors disrupting communication signals

Symptoms of U0103 RAM

  1. Difficulty shifting gears or erratic shifting patterns
  2. Vehicle stalling or hesitating during acceleration
  3. Illumination of the Check Engine Light
  4. Loss of power or reduced fuel efficiency
  5. Inability to engage certain gears or shifting into neutral unexpectedly

How to Fix U0103 RAM

  1. Begin by conducting a thorough inspection of the wiring harness and connections between the ECM and Electric Gear Shift Module. Repair or replace any damaged wiring or connectors.
  2. Use a diagnostic scan tool to reset the communication protocols between the modules and clear the DTC from the system.
  3. If the issue persists, consider replacing the Electric Gear Shift Module with a new unit to ensure proper communication.
  4. Test drive the vehicle to ensure that the gear shifting is functioning correctly and that the DTC does not reappear.
  5. If the problem persists, consult with a professional technician or dealership for further diagnostics and repair.

Cost to Fix U0103 RAM

The cost of repairing a U0103 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty Electric Gear Shift Module can range from $300 to $800, including parts and labor. However, additional costs may apply if wiring repairs or software updates are necessary. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle's make and model. Labor rates typically range from $80 to $150 per hour, but this can vary based on location and shop rates.

Need more information about the U0103 RAM code?

Need more information on how to fix the U0103 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0103 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 U0103 RAM Code

1. What does the OBDII code U0103 mean on a RAM vehicle?

U0103 indicates a loss of communication with the Electric Gear Shift Module (EGS), meaning the module is not transmitting or receiving data properly on the vehicle’s communication network.

2. What are the common symptoms of the U0103 code?

Symptoms can include the inability to shift gears, the vehicle being stuck in one gear, warning lights on the dashboard (e.g., Check Engine or Transmission), and erratic gear shifting behavior.

3. What causes the U0103 code to appear?

Common causes include faulty wiring or connectors in the CAN bus network, a malfunctioning Electric Gear Shift Module, a dead or weak vehicle battery, or a failed Powertrain Control Module (PCM).

4. Can a weak battery trigger the U0103 code?

Yes, a weak or dead battery can disrupt communication between the modules, potentially triggering the U0103 code.

5. How do I diagnose the U0103 code on my RAM?

Start by checking the battery voltage and inspecting the wiring and connectors for damage or corrosion. Use an OBDII scanner to ensure the Electric Gear Shift Module can communicate with other modules.

6. Can I drive my RAM with the U0103 code?

It is not recommended to drive with this code, as it may lead to transmission issues, inability to shift gears, or being stuck in a single gear, which can be dangerous.

7. How do you fix the U0103 code?

Repairs may include replacing damaged wiring or connectors, reprogramming or replacing the Electric Gear Shift Module, or addressing battery and voltage issues.

8. Is a replacement of the Electric Gear Shift Module always necessary for a U0103 code?

Not always. The issue could be as simple as a loose connector, damaged wiring, or a low battery. Proper diagnostics are needed before replacing the module.

9. How much does it cost to repair the U0103 code on a RAM vehicle?

Repair costs vary depending on the issue. Wiring repairs can cost $50–$200, while replacing the Electric Gear Shift Module may cost $500–$1,000 or more, including labor.

10. Can software updates resolve the U0103 code?

In some cases, a software update for the Electric Gear Shift Module or PCM may resolve communication issues and clear the U0103 code. Check with a qualified technician.

Discuss the causes and fixes for U0103 RAM OBDII Code

Submit a New Comment

Code U0103 RAM comments

No comments found for this page.