AutoCodes – Jeep – U11D9 Jeep

U11D9 Jeep 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 Jeep 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 756

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

What does this mean?

What are the Possible Causes of the DTC U11D9 Jeep?

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

How to Fix the DTC U11D9 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 U11D9 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.

Need more information about the U11D9 Jeep code?

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

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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 U11D9 Jeep Code

1. What does the OBDII code U11D9 for Jeep indicate?

The U11D9 code specifically refers to the "Lost Engine Off Time Message" in a Jeep vehicle.

2. What are the common symptoms of the U11D9 code in a Jeep?

Common symptoms include illumination of the check engine light, issues with engine performance, and potentially decreased fuel efficiency.

3. What are the possible causes of the U11D9 code in a Jeep?

Some potential causes of the U11D9 code include a faulty engine control module (ECM), wiring issues, or a malfunction in the communication network.

4. How can I diagnose the U11D9 code in my Jeep?

Diagnosing the U11D9 code typically involves using an OBDII scanner to retrieve the code, checking for any related codes, and inspecting the wiring and connections related to the engine control module.

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

It is not recommended to continue driving your Jeep with the U11D9 code present, as it can lead to further damage and potential safety risks.

6. How can I repair the U11D9 code in my Jeep?

Repairing the U11D9 code may involve resetting the code using an OBDII scanner, checking and repairing any wiring issues, or replacing the engine control module if necessary.

7. Is it safe to clear the U11D9 code without addressing the underlying issue?

Clearing the U11D9 code without addressing the underlying issue is not recommended, as the problem may persist and potentially lead to more severe issues in the future.

8. Can a DIY enthusiast fix the U11D9 code issue in a Jeep?

While some DIY enthusiasts may be able to diagnose and address simple wiring issues related to the U11D9 code, more complex problems may require professional assistance.

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

The cost of repairing the U11D9 code in a Jeep can vary depending on the underlying cause of the issue, the extent of the repairs needed, and whether any parts need to be replaced.

10. Is the U11D9 code specific to certain Jeep models or years?

The U11D9 code can be specific to certain Jeep models and years, so it's essential to consult the vehicle's manual or a professional mechanic for accurate information.