AutoCodes – Chrysler – U0103 Chrysler

U0103 Chrysler Code - Lost Communication With Electric Gear Shift Module

Quick Answer

The Transmission Control Module (TCM) receives information from the Engine, Anti-lock Brake System, and the Electronic Shift Modules (ESM) over the CAN C bus. Common causes include Electric Gear Shift Module, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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 Chrysler indicates Lost Communication With Electric Gear Shift Module.
Common causes: Common causes include Electric Gear Shift Module, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
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 4,207

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 Aug 05, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0103 Chrysler Description

The Transmission Control Module (TCM) receives information from the Engine, Anti-lock Brake System, and the Electronic Shift Modules (ESM) over the CAN C bus. The CAN C bus is a high-speed communication bus that allows real-time control capability between various controllers. Most messages are sent every 20 mSec, this means critical information can be shared between multiple controllers almost instantaneously. The CAN C bus is a two-wire bus with a CAN (+) and a CAN (-) circuit. To reduce the potential of radio and other electrical noise interference, the CAN Bus circuit wiring is manufactured using a twisted pair configuration within the electrical wiring harness. The Diagnostic Trouble Code (DTC) will set if a valid CAN ID was not received in the required time from the Electronic Gear Shift Module.

OBDII Code U0103 Chrysler - Lost Communication With Electric Gear Shift Module - AutoCodes.com — U0103 Chrysler Code - Lost Communication With Electric Gear Shift Module

What does this mean?

What are the Possible Causes of the DTC U0103 Chrysler?

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

How to Fix the DTC U0103 Chrysler?

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 U0103 Chrysler 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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Need Help with the Code?

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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 U0103 Chrysler Code

1. What are the common symptoms of OBDII code U0103 in a Chrysler indicating lost communication with the Electric Gear Shift Module?

- Common symptoms include the inability to shift gears, the gear indicator not displaying correctly, and the vehicle going into limp mode.

2. What are some potential causes of the U0103 code in a Chrysler vehicle?

- The code can be triggered by issues such as a faulty Electric Gear Shift Module, damaged wiring or connectors, a blown fuse, or a communication network problem.

3. How can I diagnose the U0103 code related to the Electric Gear Shift Module in my Chrysler?

- A thorough diagnostic process should involve checking for loose or damaged wiring, inspecting connectors for corrosion, ensuring the module has power and ground, and using a scan tool to communicate with the module.

4. Can I still drive my Chrysler if the U0103 code for the Electric Gear Shift Module is present?

- It is not recommended to drive the vehicle with this code active, as it may lead to safety issues due to the potential loss of control over the transmission.

5. What are some tips for repairing the U0103 code in a Chrysler experiencing communication issues with the Electric Gear Shift Module?

- Repair tips include checking and repairing any damaged wiring, replacing the Electric Gear Shift Module if necessary, ensuring all connections are secure, and clearing the code with a scan tool after repairs are completed.

6. Is it possible to reset the U0103 code in a Chrysler without fixing the underlying issue with the Electric Gear Shift Module?

- While you can clear the code temporarily, it is crucial to address the root cause to prevent the code from reoccurring and potentially causing further damage.

7. How much can I expect to pay to repair the U0103 code related to the Electric Gear Shift Module in my Chrysler?

- The cost of repairs can vary depending on the exact cause of the issue, but it is advisable to consult with a professional mechanic for an accurate diagnosis and estimate.

8. Can a DIY enthusiast with basic automotive knowledge fix the U0103 code in a Chrysler on their own?

- While some simple checks like inspecting wiring and connectors can be done by a DIY enthusiast, diagnosing and repairing complex issues related to the Electric Gear Shift Module may require professional expertise.

9. Are there any recalls or technical service bulletins related to the U0103 code in Chrysler vehicles?

- It is recommended to check with Chrysler dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or technical service bulletins related to this issue.

10. How long does it typically take to repair the U0103 code for lost communication with the Electric Gear Shift Module in a Chrysler?

- The repair time can vary based on the specific issue causing the code, but it is advisable to allow for sufficient time for diagnostics, parts replacement, and testing to ensure the problem is resolved effectively.