AutoCodes – Generic – U11D9

U11D9 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 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.

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Code Popularity 761

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

What does this mean?

What are the Possible Causes of the DTC U11D9?

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

How to Fix the DTC U11D9?

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 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 code?

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Need Help with the Code?

Get the U11D9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U11D9 Chrysler — Lost Engine Off Time Message
U11D9 Dodge — Lost Engine Off Time Message
U11D9 Fiat — Lost Engine Off Time Message
U11D9 Jeep — Lost Engine Off Time Message
U11D9 RAM — Lost Engine Off Time Message

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 Code

1. What are the common symptoms of the OBDII code U11D9 (Lost Engine Off Time Message)?

The common symptoms of U11D9 may include issues with the engine shutting off unexpectedly, difficulty starting the engine, and the vehicle stalling while driving.

2. What could cause the OBDII code U11D9 (Lost Engine Off Time Message) to appear?

U11D9 can be triggered by a malfunction in the engine control module (ECM), a faulty ignition switch, wiring issues, or a weak battery.

3. How can I diagnose the OBDII code U11D9 (Lost Engine Off Time Message)?

To diagnose U11D9, you can use an OBDII scanner to retrieve the code, inspect the ignition switch and wiring for any visible damage, and test the battery and charging system.

4. Are there any DIY repair tips for resolving the OBDII code U11D9?

DIY repair tips for U11D9 include checking and replacing a faulty ignition switch, repairing damaged wiring, ensuring a strong battery connection, and clearing the code with an OBDII scanner.

5. Can driving with the OBDII code U11D9 (Lost Engine Off Time Message) cause further damage to the vehicle?

Continuing to drive with U11D9 may lead to more severe issues such as engine stalling at inconvenient times or complete engine failure, so it is recommended to address the problem promptly.

6. Is it safe to ignore the OBDII code U11D9 (Lost Engine Off Time Message)?

Ignoring U11D9 can result in unexpected engine shutdowns, which may pose a safety risk while driving. It is advisable to address the underlying cause of the code as soon as possible.

7. How much does it typically cost to repair the OBDII code U11D9 (Lost Engine Off Time Message)?

The cost of repairing U11D9 can vary depending on the specific cause of the code and the labor rates in your area. Simple fixes like replacing an ignition switch may be relatively inexpensive, while more complex issues could be costly.

8. Can a mechanic easily reset the OBDII code U11D9 (Lost Engine Off Time Message) after repair?

Yes, a mechanic can reset the U11D9 code using an OBDII scanner after the underlying issue has been fixed. This will clear the code from the system and turn off the check engine light.

9. Will the OBDII code U11D9 (Lost Engine Off Time Message) prevent my vehicle from passing an emissions test?

If U11D9 is causing the engine to run improperly or stall, it may affect your vehicle's ability to pass an emissions test. It is recommended to address the issue before taking the vehicle for testing.

10. How long does it typically take to repair the OBDII code U11D9 (Lost Engine Off Time Message)?

The repair time for U11D9 can vary depending on the complexity of the underlying issue. Simple fixes may take a few hours, while more involved repairs could require a day or more to complete.