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U2142 Chevrolet Code - Lost Communication With UART System

Quick Answer

The U2142 code for Chevrolet vehicles indicates that there has been a loss of communication with the UART (Universal Asynchronous Receiver-Transmitter) system. Common causes include Faulty wiring or connections, Malfunctioning UART module, Software glitch in an onboard computer. 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
U2142 Chevrolet indicates Lost Communication With UART System.
Common causes
Common causes include Faulty wiring or connections, Malfunctioning UART module, Software glitch in an onboard computer.
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 10, 2024
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Code U2142 Chevrolet Description

The U2142 code for Chevrolet vehicles indicates that there has been a loss of communication with the UART (Universal Asynchronous Receiver-Transmitter) system. The UART system is responsible for serial communication between various components within the vehicle, such as the engine control module (ECM), transmission control module (TCM), anti-lock brake system (ABS), and other onboard computers. When communication is lost with this system, it can lead to issues with data transfer and the proper functioning of these critical components.

OBDII Code U2142 Chevrolet - Lost Communication With UART System
U2142 Chevrolet Code - Lost Communication With UART System

Common Causes of U2142 Chevrolet

  1. Faulty wiring or connections
  2. Malfunctioning UART module
  3. Software glitch in an onboard computer
  4. Faulty ECM or TCM
  5. Electrical interference or grounding issues

Symptoms of U2142 Chevrolet

  1. Check engine light illuminated on the dashboard
  2. Erratic engine performance
  3. Transmission shifting issues
  4. ABS or traction control system malfunctions
  5. Vehicle going into limp mode

How to Fix U2142 Chevrolet

  1. Use a diagnostic scanner to retrieve and record all fault codes present, including the U2142 code.
  2. Inspect all wiring and connections related to the UART system for any signs of damage or corrosion.
  3. Test the UART module for proper functionality and replace if necessary.
  4. Check for any software updates or glitches in the onboard computers and reprogram as needed.
  5. If the issue persists, further diagnostic testing may be required to pinpoint the exact cause of the communication loss.

Cost to Fix U2142 Chevrolet

The typical repair costs for addressing a U2142 code can vary depending on the specific cause of the issue. In general, replacing faulty wiring or connections may cost between $100 to $300, while replacing a malfunctioning UART module can range from $200 to $500. Software updates or reprogramming may cost around $100 to $200. Labor costs can also add to the total repair bill, with rates typically ranging from $80 to $150 per hour at most auto repair shops. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.

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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 U2142 Chevrolet Code

1. What are common symptoms of OBDII code U2142 in a Chevrolet related to lost communication with the UART system?

- Common symptoms include the check engine light illuminating, issues with the vehicle's transmission, ABS system malfunctions, and loss of communication with diagnostic tools.

2. What are possible causes of OBDII code U2142 in a Chevrolet?

- Possible causes include damaged wiring or connectors, faulty control modules, software issues, low battery voltage, or a malfunctioning UART communication system.

3. How can I diagnose the source of OBDII code U2142 in my Chevrolet?

- Diagnose the issue by checking for loose or damaged wiring, ensuring all connectors are secure, testing the battery voltage, and using a diagnostic scan tool to communicate with the vehicle's control modules.

4. Can I repair OBDII code U2142 on my Chevrolet at home?

- Depending on the exact cause, you may be able to repair the issue at home by addressing wiring or connector problems, checking and charging the battery, or resetting the control modules. However, some cases may require professional diagnosis and repair.

5. Is it safe to continue driving my Chevrolet with OBDII code U2142 present?

- It is not recommended to continue driving your Chevrolet with this code present, as it may lead to further malfunctions or safety hazards. It's best to address the underlying issue promptly.

6. How much does it typically cost to repair OBDII code U2142 in a Chevrolet?

- The cost of repairing this code can vary depending on the exact cause of the issue. Simple fixes like repairing wiring may be relatively inexpensive, while replacing control modules or addressing software issues could be more costly.

7. Can a DIY enthusiast with basic automotive knowledge fix OBDII code U2142 in a Chevrolet?

- Yes, a DIY enthusiast with basic automotive knowledge may be able to fix this code by following troubleshooting steps, checking and repairing wiring connections, and using diagnostic tools.

8. Are there any preventive measures to avoid OBDII code U2142 in a Chevrolet?

- To prevent this code, regularly inspect and maintain your vehicle's wiring, connectors, and battery health. Additionally, keeping control modules updated with the latest software may help prevent communication issues.

9. How urgent is it to address OBDII code U2142 in a Chevrolet?

- It is generally recommended to address this code promptly to prevent further damage to the vehicle's systems and ensure safe operation. Ignoring the issue could lead to more severe problems over time.

10. Can OBDII code U2142 in a Chevrolet be intermittent or persistent?

- This code can manifest as either intermittent or persistent, depending on the underlying cause. Intermittent issues may be harder to diagnose but should still be addressed to prevent potential failures.

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