AutoCodes – RAM – U1111 RAM

U1111 RAM Code - Lost Odometer Message

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Instrument Cluster reports via CAN message that the odometer signal is not available for greater than 3 seconds or Transmission Control Module (TCM) has detected that the odometer value has not changed after receiving a certain number of pulse signals from the output speed sensor. Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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: U1111 RAM indicates Lost Odometer Message.
Common causes: Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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 2,084

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 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1111 RAM Description

OBDII Code U1111 RAM - Lost Odometer Message - AutoCodes.com — U1111 RAM Code - Lost Odometer Message

What does this mean?

What are the Possible Causes of the DTC U1111 RAM?

Faulty Instrument Cluster
Instrument Cluster harness is open or shorted
Instrument Cluster circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC U1111 RAM?

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 U1111 RAM 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 U1111 RAM code?

Need more information on how to fix the U1111 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1111 RAM code diagnosed by a professional: Find a repair shop in your area

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 U1111 RAM Code

1. What does the OBDII code U1111 RAM Lost Odometer Message mean?

The U1111 code indicates that the vehicle's Engine Control Module (ECM) has lost communication with the RAM responsible for storing the odometer reading.

2. What are the common symptoms of the U1111 code?

Common symptoms of the U1111 code include the odometer display showing dashes or blank, inaccurate mileage readings, and issues with other vehicle systems that rely on accurate odometer data.

3. What are the possible causes of the U1111 code?

Possible causes of the U1111 code include a faulty ECM, damaged wiring or connectors between the ECM and RAM, a software glitch, or a malfunctioning RAM module itself.

4. How do I diagnose the U1111 code?

Diagnosing the U1111 code typically involves using a scan tool to retrieve the code, checking the wiring and connectors for any visible damage, and testing the RAM module and ECM for proper function.

5. Can I still drive my vehicle with the U1111 code?

It is generally safe to drive the vehicle with the U1111 code, but it is important to address the underlying issue promptly to ensure accurate mileage tracking and proper operation of related vehicle systems.

6. How is the U1111 code typically repaired?

Repairing the U1111 code usually involves addressing the root cause of the communication loss, which may include repairing or replacing damaged wiring, connectors, the RAM module, or the ECM itself.

7. Can the U1111 code be reset without fixing the issue?

While clearing the code may temporarily remove the warning light, the underlying problem causing the U1111 code will persist and may lead to ongoing issues with the vehicle's odometer and related systems.

8. Are there any DIY tips for addressing the U1111 code?

DIY tips for the U1111 code may include checking and cleaning connectors, ensuring proper wiring connections, and performing a software update if recommended by the manufacturer.

9. Is the U1111 code specific to certain vehicle makes or models?

The U1111 code can appear in various vehicle makes and models that utilize OBDII systems, but the specific interpretation and impact of the code may vary depending on the manufacturer.

10. How much does it typically cost to repair the U1111 code?

The cost of repairing the U1111 code can vary widely depending on the underlying cause, the need for parts replacement, and labor costs. It is advisable to consult with a trusted mechanic for an accurate estimate.