AutoCodes – Saturn – U2149 Saturn

U2149 Saturn Code - Lost Communication With Tire Pressure Monitor System

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Tire Pressure Monitor (TPM) Module, Tire Pressure Monitor Module harness is open or shorted, Tire Pressure Monitor 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: U2149 Saturn indicates Lost Communication With Tire Pressure Monitor System.
Common causes: Common causes include Faulty Tire Pressure Monitor (TPM) Module, Tire Pressure Monitor Module harness is open or shorted, Tire Pressure Monitor 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 1,159

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 Jun 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2149 Saturn Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2149 Saturn - Lost Communication With Tire Pressure Monitor System - AutoCodes.com — U2149 Saturn Code - Lost Communication With Tire Pressure Monitor System

What does this mean?

What are the Possible Causes of the DTC U2149 Saturn?

Faulty Tire Pressure Monitor (TPM) Module
Tire Pressure Monitor Module harness is open or shorted
Tire Pressure Monitor Module circuit poor electrical connection

How to Fix the DTC U2149 Saturn?

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 U2149 Saturn 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.

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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 U2149 Saturn Code

1. What are the common symptoms of OBDII code U2149 on a Saturn related to lost communication with the tire pressure monitor system?

- Common symptoms include the TPMS warning light appearing on the dashboard, inaccurate tire pressure readings, and potential loss of communication with the tire pressure monitoring system.

2. What are the possible causes of OBDII code U2149 on a Saturn indicating lost communication with the TPMS?

- Possible causes include a faulty TPMS sensor, damaged wiring or connectors in the TPMS system, low tire pressure, or issues with the TPMS module.

3. How can I diagnose the OBDII code U2149 on my Saturn for communication issues with the TPMS?

- Diagnose the code by checking the tire pressure in all tires, inspecting the TPMS sensors for damage, scanning the TPMS module for error codes, and checking the wiring and connectors for any issues.

4. Can I continue driving my Saturn with OBDII code U2149 related to lost communication with the TPMS?

- It is not recommended to continue driving with this code as it can affect the accuracy of your tire pressure readings, potentially leading to unsafe driving conditions.

5. Is it possible to reset the OBDII code U2149 on a Saturn related to lost communication with the TPMS?

- Resetting the code may temporarily turn off the warning light, but it is important to address the underlying issue causing the lost communication with the TPMS to prevent it from reoccurring.

6. How can I repair OBDII code U2149 on my Saturn to restore communication with the TPMS?

- Repair options include replacing a faulty TPMS sensor, repairing damaged wiring or connectors, recalibrating the TPMS system, or resetting the TPMS module to establish communication.

7. Are there any maintenance tips to prevent OBDII code U2149 on a Saturn related to the TPMS?

- Regularly check tire pressure, visually inspect TPMS sensors for damage, and ensure proper maintenance of the TPMS system to prevent communication issues and the triggering of this code.

8. Can extreme weather conditions affect the communication between the Saturn and the TPMS system, leading to code U2149?

- Extreme weather conditions, such as temperature fluctuations or severe cold, can impact the performance of the TPMS system and potentially lead to communication issues triggering the U2149 code.

9. Will fixing OBDII code U2149 on my Saturn require specialized tools or professional assistance?

- Depending on the underlying cause, fixing the code may require specialized diagnostic tools, such as a TPMS scan tool, and professional assistance for complex repairs like module replacement or system recalibration.

10. How long does it typically take to repair OBDII code U2149 on a Saturn related to lost communication with the TPMS?

- The repair time can vary based on the cause of the communication issue with the TPMS. Simple fixes like reprogramming or sensor replacement may take a short time, while more complex issues could require more extensive repair and diagnostic work.