AutoCodes – Chevrolet – U2142 Chevrolet

U2142 Chevrolet Code - Lost Communication With UART System

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Universal Asynchronous Receiver Transmitter (UART), Universal Asynchronous Receiver Transmitter harness is open or shorted, Universal Asynchronous Receiver Transmitter 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: U2142 Chevrolet indicates Lost Communication With UART System.
Common causes: Common causes include Faulty Universal Asynchronous Receiver Transmitter (UART), Universal Asynchronous Receiver Transmitter harness is open or shorted, Universal Asynchronous Receiver Transmitter 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 6,591

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 U2142 Chevrolet 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 U2142 Chevrolet - Lost Communication With UART System - AutoCodes.com — U2142 Chevrolet Code - Lost Communication With UART System

What does this mean?

What are the Possible Causes of the DTC U2142 Chevrolet?

Faulty Universal Asynchronous Receiver Transmitter (UART)
Universal Asynchronous Receiver Transmitter harness is open or shorted
Universal Asynchronous Receiver Transmitter circuit poor electrical connection

How to Fix the DTC U2142 Chevrolet?

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 U2142 Chevrolet 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 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.