AutoCodes – Jeep – U1120 Jeep

U1120 Jeep Code - Lost Wheel Distance Message

Quick Answer

The Powertrain Control Module (PCM) receives the vehicle speed signal over the Controlled Area Network (CAN) C bus from the Anti-Lock Brake System (ABS) Module. 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: U1120 Jeep indicates Lost Wheel Distance Message .
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 14,659

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1120 Jeep Description

The Powertrain Control Module (PCM) receives the vehicle speed signal over the Controlled Area Network (CAN) C bus from the Anti-Lock Brake System (ABS) Module. The Diagnostic Trouble Code (DTC) sets when the PCM doesn't receive a vehicle speed signal from the Anti-Lock Brake System Module over the CAN C bus. One Trip fault.

OBDII Code U1120 Jeep - Lost Wheel Distance Message - AutoCodes.com — U1120 Jeep Code - Lost Wheel Distance Message

What does this mean?

What are the Possible Causes of the DTC U1120 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 U1120 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 U1120 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.

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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 U1120 Jeep Code

1. What does the OBDII code U1120 for Jeep mean?

The U1120 code in Jeep vehicles indicates a "Lost Wheel Distance Message" error, typically related to communication issues within the ABS system.

2. What are the common symptoms of a U1120 code in a Jeep?

Common symptoms of a U1120 code may include the ABS warning light being illuminated on the dashboard, loss of ABS functionality, and potential traction control issues.

3. What are the possible causes of a U1120 code in a Jeep?

The U1120 code in a Jeep can be caused by damaged wheel speed sensors, faulty ABS module, wiring issues, or communication problems between control modules.

4. How can I diagnose a U1120 code in my Jeep?

Diagnosing a U1120 code in a Jeep typically involves using an OBDII scanner to retrieve the code, checking the wheel speed sensors for proper operation, inspecting wiring for damage, and testing the ABS module for faults.

5. Can I still drive my Jeep with a U1120 code?

It is not recommended to drive a vehicle with an active U1120 code, as it may affect the ABS system's functionality and compromise overall safety. It's advisable to address the issue promptly.

6. How can I repair a U1120 code in my Jeep?

Repairing a U1120 code in a Jeep involves addressing the root cause, which could include replacing faulty wheel speed sensors, repairing damaged wiring, or reprogramming the ABS module. Professional diagnosis and repair are recommended.

7. Are there any simple DIY fixes for a U1120 code in a Jeep?

While some basic checks like inspecting the wheel speed sensor connections and fuses can be done by DIY enthusiasts, resolving a U1120 code often requires specialized tools and expertise, making professional assistance advisable.

8. How much does it cost to fix a U1120 code in a Jeep?

The cost of fixing a U1120 code in a Jeep can vary depending on the underlying issue, parts needed for replacement, and labor costs. It's recommended to obtain quotes from reputable mechanics or dealerships.

9. Can a U1120 code reset itself in a Jeep?

In some cases, a U1120 code may reset itself after the underlying issue is resolved. However, it's best to use an OBDII scanner to clear the code after repairs to ensure the problem is fully addressed.

10. Is the U1120 code in a Jeep a serious issue?

While a U1120 code may not always indicate a critical problem, it should be taken seriously as it affects the ABS system's functionality, potentially compromising vehicle safety. Prompt diagnosis and repair are recommended.