AutoCodes – RAM – U11D9 RAM

U11D9 RAM Code - Lost Engine Off Time Message

Quick Answer

This diagnostic checks the availability of the engine off time signal which is sent by the Powertrain Control Module (PCM) via a Controller Area Network (CAN) message. Common causes include Faulty Powertrain Control Module (PCM), Faulty Transmission Control Module (TCM). 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: U11D9 RAM indicates Lost Engine Off Time Message.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Faulty Transmission Control Module (TCM).
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 424

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U11D9 RAM Description

This diagnostic checks the availability of the engine off time signal which is sent by the Powertrain Control Module (PCM) via a Controller Area Network (CAN) message. The diagnostic checks the availability by checking the received value is not equal to the Signal Not Available (SNA) default value. When the signal is not available, the PCM sends a SNA default value to the Transmission Control Module (TCM). If the TCM reads this value then the Diagnostic Trouble Code (DTC) U11D9 is set.

OBDII Code U11D9 RAM - Lost Engine Off Time Message - AutoCodes.com — U11D9 RAM Code - Lost Engine Off Time Message

What does this mean?

What are the Possible Causes of the DTC U11D9 RAM?

Faulty Powertrain Control Module (PCM)
Faulty Transmission Control Module (TCM)

How to Fix the DTC U11D9 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 U11D9 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 U11D9 RAM code?

Need more information on how to fix the U11D9 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U11D9 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 U11D9 RAM Code

1. What does the OBDII code U11D9 RAM Lost Engine Off Time Message indicate?

This code indicates that the vehicle's onboard computer has lost the engine off time message stored in the Random Access Memory (RAM).

2. What are the common symptoms of the U11D9 code?

Common symptoms associated with this code may include illuminated Check Engine Light, rough idling, decreased fuel efficiency, and potential starting issues.

3. What are the possible causes of the U11D9 code?

Potential causes of the U11D9 code include a faulty engine control module (ECM), electrical issues, software glitches, or a loss of communication between modules.

4. How do I diagnose the U11D9 code?

Diagnosing the U11D9 code typically involves using an OBDII scanner to retrieve the code, checking for any related codes, inspecting the wiring and connections, and testing the ECM for proper functionality.

5. Can I continue driving with the U11D9 code present?

It is not recommended to drive the vehicle with the U11D9 code present, as it can lead to potential performance issues and further damage if left unresolved.

6. How can I repair the U11D9 code?

Repairing the U11D9 code may involve resetting the ECM, checking and repairing any wiring issues, updating the software, or replacing the ECM if necessary.

7. Can a DIY enthusiast fix the U11D9 code?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the U11D9 code may require advanced tools and expertise, so it is recommended to consult a professional mechanic.

8. Is the U11D9 code a common issue in certain vehicle makes and models?

The U11D9 code may be more common in specific vehicle makes and models that have known issues with their ECM or communication systems.

9. How much does it typically cost to repair the U11D9 code?

The cost of repairing the U11D9 code can vary depending on the root cause of the issue, the labor rates in your area, and if any parts need replacement. It is advisable to obtain quotes from different mechanics.

10. How can I prevent the U11D9 code from reoccurring?

To prevent the U11D9 code from reoccurring, it is essential to perform regular maintenance on your vehicle, address any underlying electrical issues promptly, and follow the manufacturer's recommended service schedule.