U1120 Code - Lost Wheel Distance Message
Quick Answer
The U1120 diagnostic trouble code (DTC) refers to a "Lost Wheel Distance Message." This code typically indicates a communication issue between the vehicle's electronic control modules (ECMs) regarding the wheel distance information. Common causes include Faulty wheel speed sensors, Corroded or damaged wiring/connectors in the CAN communication network, ECM software issues. 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 indicates Lost Wheel Distance Message .
- Common causes
- Common causes include Faulty wheel speed sensors, Corroded or damaged wiring/connectors in the CAN communication network, ECM software issues.
- 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 U1120 Description
The U1120 diagnostic trouble code (DTC) refers to a "Lost Wheel Distance Message." This code typically indicates a communication issue between the vehicle's electronic control modules (ECMs) regarding the wheel distance information. In modern vehicles, various control modules communicate with each other through a network known as the Controller Area Network (CAN). The wheel distance message is crucial for systems such as the ABS (Anti-lock Braking System), traction control, and stability control to function properly.
Common Causes of U1120
- Faulty wheel speed sensors.
- Corroded or damaged wiring/connectors in the CAN communication network.
- ECM software issues.
- Mechanical issues affecting the wheel distance measurements.
- Faulty ECMs responsible for processing wheel distance information.
Symptoms of U1120
- Illuminated ABS warning light on the dashboard.
- Loss of traction control and stability control functionality.
- Increased stopping distances during braking.
- Unusual noises coming from the wheel area.
- Erratic behavior of the speedometer or odometer readings.
How to Fix U1120
- Diagnose the root cause of the communication issue by scanning the vehicle's ECM for trouble codes.
- Inspect the wheel speed sensors and related wiring for any damage or corrosion.
- Check the CAN communication network for any loose connections or faulty modules.
- Update ECM software to the latest version to address any software-related issues.
- Replace faulty wheel speed sensors or ECMs as necessary to restore proper communication and functionality.
Cost to Fix U1120
The typical repair costs for addressing a U1120 code can vary depending on the specific cause of the issue. In general, replacing a faulty wheel speed sensor can cost between $100 and $200 per sensor, including parts and labor. If the issue is related to damaged wiring or faulty ECMs, the repair costs can range from $200 to $500 or more, depending on the extent of the damage and the components that need replacement.
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Code U1120 Information for Specific Makes
- U1120 Chrysler — Lost Wheel Distance Message
- U1120 Dodge — Lost Wheel Distance Message
- U1120 Jeep — Lost Wheel Distance Message
- U1120 RAM — Lost Wheel Distance Message
Frequently Asked Questions about U1120 Code
1. What is OBDII code U1120?
Code U1120, also known as the Lost Wheel Distance Message, is a communication error between the anti-lock braking system (ABS) and the powertrain control module (PCM).
2. What are the symptoms of a U1120 code?
Common symptoms of a U1120 code include the ABS warning light illuminating on the dashboard, traction control issues, and potential loss of communication with the wheel speed sensors.
3. What are the possible causes of a U1120 code?
The U1120 code can be triggered by issues such as damaged wiring or connectors, faulty wheel speed sensors, a malfunctioning ABS module, or a communication error between modules.
4. How is a U1120 code diagnosed?
Diagnosing a U1120 code typically involves using a professional OBDII scanner to retrieve the fault code, checking for any related ABS or traction control codes, and inspecting the ABS system components for any visible damage.
5. Can a U1120 code be fixed at home?
While some DIY enthusiasts may attempt to address a U1120 code at home by checking wiring connections and sensor integrity, diagnosing and repairing communication errors between modules often requires professional diagnostic equipment and expertise.
6. How much does it cost to repair a U1120 code?
The cost of repairing a U1120 code can vary depending on the underlying cause. Simple fixes like replacing a faulty sensor may cost a few hundred dollars, while more complex issues involving module replacements could cost upwards of a thousand dollars.
7. Will a U1120 code cause my vehicle to fail an emissions test?
In most cases, a U1120 code related to the ABS system should not cause your vehicle to fail an emissions test. However, it is essential to address the issue promptly to ensure proper functioning of the ABS and traction control systems.
8. Can driving with a U1120 code cause further damage to my vehicle?
Continuing to drive with a U1120 code may not necessarily cause immediate harm to your vehicle, but it can potentially impact the performance of the ABS and traction control systems, compromising your safety on the road.
9. How long does it take to repair a U1120 code?
The repair time for a U1120 code can vary depending on the complexity of the underlying issue. Simple fixes may be completed within a few hours, while more involved repairs could take a day or longer, especially if parts need to be ordered.
10. Is it safe to drive with a U1120 code illuminated?
While it may be safe to drive with a U1120 code in some cases, it is recommended to have the issue diagnosed and repaired as soon as possible to ensure the proper functioning of your vehicle's ABS and traction control systems.
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