AutoCodes – Generic – U1449

U1449 Code - Implausible ERS Message Recieved Transmission Control Module

Quick Answer

This message is used by the Transmission Control Module (TCM) for Electronic Range Select (ERS) operation. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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: U1449 indicates Implausible ERS Message Recieved Transmission Control Module.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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 3,538

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1449 Description

This message is used by the Transmission Control Module (TCM) for Electronic Range Select (ERS) operation. The ERS switch is hard wired to the Cabin Compartment Node (CCN). The CCN then sends a CAN bus message to the TCM. This Diagnostic Trouble Code (DTC) is set when the ERS message is not received or invalid.

OBDII Code U1449 - Implausible ERS Message Recieved Transmission Control Module - AutoCodes.com — U1449 Code - Implausible ERS Message Recieved Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U1449?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection
Faulty Cabin Compartment Node (CCN)

How to Fix the DTC U1449?

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 U1449 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 U1449 code?

Need more information on how to fix the U1449 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1449 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1449 Chrysler — Implausible ERS Message Recieved Transmission Control Module
U1449 Dodge — Implausible ERS Message Recieved Transmission Control Module
U1449 Jeep — Implausible ERS Message Recieved Transmission Control Module
U1449 RAM — Implausible ERS Message Recieved Transmission Control Module

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 U1449 Code

What does the OBDII code U1449 mean?

The OBDII code U1449 indicates that the Transmission Control Module (TCM) has received an implausible message from the Electronic Rollover Sensor (ERS), which may affect vehicle stability and transmission operation.

What are the common symptoms of the U1449 code?

Common symptoms include erratic shifting, transmission slipping, warning lights on the dashboard (such as the check engine light), and potential issues with vehicle stability control.

What could cause the U1449 code to trigger?

Causes may include a faulty Electronic Rollover Sensor, damaged wiring or connectors between the sensor and TCM, or a malfunctioning Transmission Control Module itself.

How can I diagnose the U1449 code?

To diagnose U1449, use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, check the ERS for proper operation, and look for related codes that might provide additional context.

Can I drive my vehicle with the U1449 code?

While it may be possible to drive the vehicle, doing so is not recommended as it can lead to unpredictable transmission behavior and potentially compromise safety features.

What are some common repair steps for the U1449 code?

Common repair steps include replacing a faulty Electronic Rollover Sensor, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the Transmission Control Module if necessary.

Is the U1449 code serious?

Yes, the U1449 code can be serious because it involves the transmission control and stability systems, which are crucial for safe vehicle operation.

How can I prevent the U1449 code from returning after repairs?

To prevent the U1449 code from returning, ensure that all wiring and connectors are in good condition, replace any faulty components, and perform regular diagnostic checks on the vehicle's systems.

Will clearing the code fix the underlying problem?

No, simply clearing the code will not fix the underlying issue. It's essential to diagnose and address the root cause to prevent the code from reappearing.