AutoCodes – Jeep – U1149 Jeep

U1149 Jeep Code - Lost Communication With Multi-Function Switch

Quick Answer

The Powertrain Control Module (PCM) monitors the Multi-Function Switch. Common causes include Faulty Left Multifunction Switch, Left Multifunction Switch harness is open or shorted, Left Multifunction Switch 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: U1149 Jeep indicates Lost Communication With Multi-Function Switch.
Common causes: Common causes include Faulty Left Multifunction Switch, Left Multifunction Switch harness is open or shorted, Left Multifunction Switch 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 7,909

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1149 Jeep Description

The Powertrain Control Module (PCM) monitors the Multi-Function Switch. The PCM sets the OBDII code when the Multi-Function Switch is not to factory specifications or the Cluster does not receive any LIN Bus messages from the Left Multifunction Switch.

OBDII Code U1149 Jeep - Lost Communication With Multi-Function Switch - AutoCodes.com — U1149 Jeep Code - Lost Communication With Multi-Function Switch

What does this mean?

What are the Possible Causes of the DTC U1149 Jeep?

Faulty Left Multifunction Switch
Left Multifunction Switch harness is open or shorted
Left Multifunction Switch circuit poor electrical connection

How to Fix the DTC U1149 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 U1149 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 U1149 Jeep code?

Need more information on how to fix the U1149 Jeep code? Get Access to Factory Service Manuals

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Get the U1149 Jeep 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 U1149 Jeep Code

1. What are common symptoms of OBDII code U1149 in a Jeep indicating lost communication with the multi-function switch?

- Common symptoms include non-functional turn signals, malfunctioning windshield wipers, and issues with controlling headlights or high beams.

2. What are the potential causes of OBDII code U1149 in a Jeep related to lost communication with the multi-function switch?

- Possible causes may include a faulty multi-function switch, damaged wiring or connectors, a blown fuse, or issues with the vehicle's body control module.

3. How can I diagnose the OBDII code U1149 in a Jeep when experiencing communication problems with the multi-function switch?

- To diagnose this issue, you can use a diagnostic scanner to retrieve the trouble codes, visually inspect the wiring and connectors for any visible damage, and perform circuit tests to check for continuity.

4. What are some tips for repairing OBDII code U1149 in a Jeep due to lost communication with the multi-function switch?

- Repair tips include replacing the faulty multi-function switch, repairing any damaged wiring or connectors, checking and replacing blown fuses, and resetting the system after making repairs.

5. Can I drive my Jeep with OBDII code U1149 indicating lost communication with the multi-function switch?

- It is not recommended to drive the vehicle with this issue as it can affect critical functions like turn signals and windshield wipers, compromising safety on the road.

6. How much does it typically cost to repair OBDII code U1149 in a Jeep caused by lost communication with the multi-function switch?

- The cost of repairs can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Will resetting the OBDII system clear the U1149 code related to lost communication with the multi-function switch in a Jeep?

- Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

8. Is OBDII code U1149 in a Jeep a common issue related to the multi-function switch?

- Yes, this code is commonly associated with communication problems between the vehicle's control modules and the multi-function switch, leading to various electrical issues.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code U1149 in a Jeep themselves?

- Depending on the specific cause of the issue, DIY enthusiasts may be able to address simpler issues like fuse replacements or basic wiring repairs, but more complex problems may require professional assistance.

10. How long does it typically take to repair OBDII code U1149 in a Jeep due to lost communication with the multi-function switch?

- The repair time can vary based on the extent of the issue and the expertise of the mechanic, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.