AutoCodes – Dodge – U1003 Dodge

U1003 Dodge Code - Controller Area Network Bus Performance

Quick Answer

The Diagnostic Trouble Code (DTC) sets if the Anti-lock Brake System (ABS) Module fails to receive bus messages from the Dynamic Sensor for approximately 150 ms. Common causes include Faulty Anti-lock Brake System (ABS) Module, Anti-lock Brake System (ABS) Module harness is open or shorted, Anti-lock Brake System (ABS) 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: U1003 Dodge indicates Controller Area Network Bus Performance.
Common causes: Common causes include Faulty Anti-lock Brake System (ABS) Module, Anti-lock Brake System (ABS) Module harness is open or shorted, Anti-lock Brake System (ABS) 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 4,721

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1003 Dodge Description

The Diagnostic Trouble Code (DTC) sets if the Anti-lock Brake System (ABS) Module fails to receive bus messages from the Dynamic Sensor for approximately 150 ms.

OBDII Code U1003 Dodge - Controller Area Network Bus Performance - AutoCodes.com — U1003 Dodge Code - Controller Area Network Bus Performance

What does this mean?

What are the Possible Causes of the DTC U1003 Dodge?

Faulty Anti-lock Brake System (ABS) Module
Anti-lock Brake System (ABS) Module harness is open or shorted
Anti-lock Brake System (ABS) Module circuit poor electrical connection

How to Fix the DTC U1003 Dodge?

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 U1003 Dodge 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 U1003 Dodge Code

1. What are the common symptoms of OBDII code U1003 in a Dodge vehicle?

- Common symptoms include intermittent or complete loss of communication with various control modules, warning lights on the dashboard, and issues with vehicle performance.

2. What are the possible causes of the U1003 code in a Dodge?

- The U1003 code in a Dodge may be caused by wiring or connection issues in the Controller Area Network (CAN) bus, faulty control modules, or a malfunctioning CAN bus system.

3. How can I diagnose the U1003 code in my Dodge?

- To diagnose the U1003 code, you will need a diagnostic scanner that can read OBDII codes. Check the wiring and connections in the CAN bus system, test the control modules for faults, and ensure proper power and ground connections.

4. Can I drive my Dodge with the U1003 code present?

- It is not recommended to drive your Dodge with the U1003 code present, as it can lead to potential safety hazards and further damage to the vehicle's systems.

5. How can I repair the U1003 code in my Dodge?

- Repairing the U1003 code may involve repairing or replacing damaged wiring, connectors, or control modules in the CAN bus system. It is advisable to consult with a professional mechanic for proper diagnosis and repair.

6. Are there any DIY tips for fixing the U1003 code in my Dodge?

- DIY tips for fixing the U1003 code may include checking and cleaning the connectors, ensuring proper grounding, and inspecting the wiring for any visible damage. However, complex issues may require professional assistance.

7. Can a low battery voltage trigger the U1003 code in a Dodge?

- Yes, a low battery voltage can sometimes trigger the U1003 code in a Dodge, as it can disrupt the communication between control modules in the CAN bus system.

8. What role does the Controller Area Network (CAN) bus play in triggering the U1003 code?

- The CAN bus system in a vehicle facilitates communication between various control modules. Issues in the CAN bus, such as interruptions or faults, can trigger the U1003 code due to a performance problem.

9. Is the U1003 code specific to Dodge vehicles, or can it occur in other car makes?

- The U1003 code related to Controller Area Network Bus Performance is not specific to Dodge vehicles and can occur in other car makes with a CAN bus system.

10. How can regular maintenance help prevent the U1003 code from appearing in my Dodge?

- Regular maintenance, including checking and cleaning connectors, ensuring proper battery voltage, and inspecting the CAN bus system during routine service, can help prevent issues that may trigger the U1003 code in your Dodge.