AutoCodes – GMC – U2149 GMC

U2149 GMC 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 GMC 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 524

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

What does this mean?

What are the Possible Causes of the DTC U2149 GMC?

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 GMC?

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 GMC 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 GMC Code

1. What are the common symptoms of OBDII code U2149 GMC?

The common symptoms include the tire pressure monitoring system (TPMS) light illuminating on the dashboard, inaccurate or missing tire pressure readings, and potential issues with the vehicle's stability control system.

2. What are the possible causes of U2149 GMC code?

The code U2149 indicates a lost communication with the tire pressure monitor system. Possible causes may include faulty TPMS sensors, wiring or connection issues, a malfunctioning TPMS module, or a problem with the vehicle's CAN bus communication network.

3. How can I diagnose the U2149 GMC code?

Diagnosing the U2149 code typically involves using a diagnostic scanner to retrieve the specific error codes stored in the vehicle's computer. Additionally, a visual inspection of the TPMS sensors, wiring, and connections may help identify any obvious issues.

4. How can I repair the U2149 GMC code?

Repairing the U2149 code may involve resetting the TPMS system, replacing faulty TPMS sensors, repairing damaged wiring or connectors, or recalibrating the TPMS module. In some cases, reprogramming the vehicle's control module may be necessary.

5. Can driving with the U2149 code present cause any harm to the vehicle?

While driving with the U2149 code present is usually not a safety concern, it is important to address the underlying issue causing the communication loss with the TPMS system. Ignoring the problem may lead to inaccurate tire pressure readings and potential safety risks.

6. Is it possible to reset the U2149 GMC code without replacing any components?

In some cases, resetting the U2149 code may be possible by clearing the error codes using a diagnostic scanner. However, if the underlying issue causing the communication loss with the TPMS system is not resolved, the code is likely to reappear.

7. How much does it typically cost to repair the U2149 GMC code?

The cost of repairing the U2149 code can vary depending on the cause of the issue and the necessary repairs. Replacing TPMS sensors or repairing wiring may cost a few hundred dollars, while more complex repairs involving the control module can be more expensive.

8. Can I attempt to repair the U2149 code myself, or should I seek professional help?

While some basic troubleshooting steps can be taken by DIY enthusiasts, diagnosing and repairing the U2149 code may require specialized tools and expertise. For complex issues or if unsure, it is recommended to seek the assistance of a professional mechanic.

9. How often should I check my vehicle's tire pressure to prevent U2149 GMC code from occurring?

Regularly checking and maintaining proper tire pressure is essential in preventing TPMS-related issues like the U2149 code. It is advisable to check tire pressure at least once a month and before long trips, using a reliable tire pressure gauge.

10. Will resetting the U2149 code make the TPMS system fully functional again?

Resetting the U2149 code may clear the error temporarily, but if the underlying issue causing the communication loss is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause to ensure the TPMS system functions properly.