AutoCodes – Generic – U1149

U1149 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 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 16,340

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

What does this mean?

What are the Possible Causes of the DTC U1149?

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?

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 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 code?

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

Need Help with the Code?

Get the U1149 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1149 Chrysler — Lost Communication With Multi-Function Switch
U1149 Dodge — Lost Communication With Multi-Function Switch
U1149 Jeep — Lost Communication With Multi-Function Switch

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.