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Engine-Codes – GMC – U2149 GMC

U2149 GMC Code - Lost Communication With Tire Pressure Monitor System

Quick Answer

The U2149 diagnostic trouble code for GMC vehicles indicates that there is a communication failure with the Tire Pressure Monitor System (TPMS). Common causes include Faulty TPMS sensor, Wiring issues connecting the TPMS sensors to the vehicle's computer, Corrosion or damage to the TPMS sensor connectors. 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 TPMS sensor, Wiring issues connecting the TPMS sensors to the vehicle's computer, Corrosion or damage to the TPMS sensor connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code U2149 GMC Description

The U2149 diagnostic trouble code for GMC vehicles indicates that there is a communication failure with the Tire Pressure Monitor System (TPMS). The TPMS is a system designed to monitor the air pressure in the tires of a vehicle and alert the driver if any tire is underinflated.

OBDII Code U2149 GMC - Lost Communication With Tire Pressure Monitor System
U2149 GMC Code - Lost Communication With Tire Pressure Monitor System

Common Causes of U2149 GMC

  1. Faulty TPMS sensor.
  2. Wiring issues connecting the TPMS sensors to the vehicle's computer.
  3. Corrosion or damage to the TPMS sensor connectors.
  4. Malfunctioning vehicle computer system.

Symptoms of U2149 GMC

  1. TPMS warning light illuminated on the dashboard.
  2. Inaccurate tire pressure readings displayed on the instrument cluster.
  3. Fluctuating tire pressure readings while driving.
  4. Loss of communication with the TPMS sensors, leading to decreased safety on the road.

How to Fix U2149 GMC

  1. Begin by checking the tire pressure in all four tires to ensure they are properly inflated.
  2. Use a scan tool to communicate with the vehicle's computer and retrieve the U2149 code.
  3. Inspect the TPMS sensors and wiring for any visible damage or corrosion.
  4. Replace any faulty TPMS sensors or repair any damaged wiring.
  5. Clear the U2149 code from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix U2149 GMC

The cost of repairing a U2149 code can vary depending on the specific cause of the issue. In general, replacing a faulty TPMS sensor can cost between $50 and $200 per sensor, including parts and labor. If the issue is related to wiring or the vehicle's computer system, the repair costs may be higher.

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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.

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