AutoCodes – Jeep – U1003 Jeep

U1003 Jeep 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 Jeep 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 8,734

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 Apr 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1003 Jeep 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 Jeep - Controller Area Network Bus Performance - AutoCodes.com — U1003 Jeep Code - Controller Area Network Bus Performance

What does this mean?

What are the Possible Causes of the DTC U1003 Jeep?

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 Jeep?

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 Jeep 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.

Need more information about the U1003 Jeep code?

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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 U1003 Jeep Code

1. What are the common symptoms of OBDII code U1003 in a Jeep related to Controller Area Network Bus Performance?

- Common symptoms include erratic behavior of electronic components, loss of communication between modules, and illuminated warning lights on the dashboard.

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

- The U1003 code in a Jeep may be caused by issues such as faulty wiring, loose connections, a defective control module, or a malfunctioning CAN bus system.

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

- To diagnose the U1003 code, a thorough inspection of the wiring and connections related to the CAN bus system is recommended. Additionally, using a diagnostic scanner to read trouble codes and identify the specific module causing the issue may be necessary.

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

- It is not recommended to drive your Jeep with the U1003 code present, as it may lead to further issues with the vehicle's performance and safety systems.

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

- Repairing the U1003 code in a Jeep involves addressing the underlying cause of the communication failure within the CAN bus system. This may include repairing or replacing damaged wiring, fixing loose connections, or replacing a faulty control module.

6. Will resetting the trouble codes clear the U1003 code in my Jeep?

- Resetting the trouble codes may temporarily clear the U1003 code, but it is important to diagnose and repair the underlying issue to prevent the code from reappearing.

7. Is the U1003 code a common issue in Jeep vehicles?

- The U1003 code related to Controller Area Network Bus Performance is not uncommon in Jeep vehicles, especially in older models or those with high mileage.

8. Can extreme weather conditions affect the occurrence of the U1003 code in a Jeep?

- Extreme weather conditions, such as extreme cold or heat, can potentially affect the electrical components and connections related to the CAN bus system, leading to the U1003 code.

9. Are there any preventative maintenance steps to avoid the U1003 code in a Jeep?

- Regularly inspecting the wiring and connections in the CAN bus system, as well as keeping the vehicle's electrical system in good condition, can help prevent the occurrence of the U1003 code in a Jeep.

10. How long does it typically take to repair the U1003 code in a Jeep?

- The time it takes to repair the U1003 code in a Jeep can vary depending on the underlying cause and complexity of the issue. Simple fixes like reconnecting loose wires may take a short time, while more involved repairs could require several hours or more.