AutoCodes – Chevrolet – U02A3 Chevrolet

U02A3 Chevrolet Code - Lost Communication With Particulate Matter Sensor Module

Quick Answer

Devices connected to the Powertrain High-Speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor 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: U02A3 Chevrolet indicates Lost Communication With Particulate Matter Sensor Module.
Common causes: Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor 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 4,712

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 Oct 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U02A3 Chevrolet Description

Devices connected to the Powertrain High-Speed General Motor Local Area Network (GMLAN) 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 DTC. The DTC will be set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U02A3 Chevrolet - Lost Communication With Particulate Matter Sensor Module - AutoCodes.com — U02A3 Chevrolet Code - Lost Communication With Particulate Matter Sensor Module

What does this mean?

What are the Possible Causes of the DTC U02A3 Chevrolet?

Faulty Exhaust Particulate Matter Sensor
Exhaust Particulate Matter Sensor harness is open or shorted
Exhaust Particulate Matter Sensor circuit poor electrical connection

How to Fix the DTC U02A3 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 U02A3 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.

Need more information about the U02A3 Chevrolet code?

Need more information on how to fix the U02A3 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U02A3 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

U02A3 2014 Chevrolet Silverado — Lost Communication With Particulate Matter Sensor Module
U02A3 2015 Chevrolet Silverado — Lost Communication With Particulate Matter Sensor Module
U02A3 2016 Chevrolet Silverado — Lost Communication With Particulate Matter Sensor Module
U02A3 2017 Chevrolet Silverado — Lost Communication With Particulate Matter Sensor Module
U02A3 2018 Chevrolet Silverado — Lost Communication With Particulate Matter Sensor Module

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 U02A3 Chevrolet Code

1. What are common symptoms of the U02A3 OBDII code related to the Particulate Matter Sensor Module in a Chevrolet?

- Common symptoms include poor fuel efficiency, loss of power, rough idling, and the illumination of the check engine light.

2. What are some possible causes of the U02A3 OBDII code indicating Lost Communication With Particulate Matter Sensor Module in a Chevrolet?

- Possible causes include a faulty Particulate Matter Sensor Module, damaged wiring or connectors, software glitches, or communication network issues.

3. How can I diagnose the U02A3 OBDII code in my Chevrolet related to the Particulate Matter Sensor Module?

- Diagnosis typically involves using an OBDII scanner to read the code, checking for any related codes, inspecting wiring and connectors, and testing the Particulate Matter Sensor Module.

4. What should I do if I get the U02A3 OBDII code for Lost Communication With Particulate Matter Sensor Module in my Chevrolet?

- It is recommended to first check the wiring and connectors for any issues, reset the code, and see if it reoccurs. If the problem persists, consult with a professional mechanic for further diagnosis and repair.

5. Can I continue driving my Chevrolet with the U02A3 OBDII code related to the Particulate Matter Sensor Module?

- It is generally not recommended to continue driving with this code present, as it can lead to potential issues with fuel efficiency and engine performance. It is best to address the problem as soon as possible.

6. Is it possible to repair the U02A3 OBDII code indicating Lost Communication With Particulate Matter Sensor Module in my Chevrolet on my own?

- While some basic checks like inspecting wiring and connectors can be done DIY, resolving the root cause of the code may require specialized tools and expertise. It is advisable to seek professional help for accurate diagnosis and repair.

7. How much does it typically cost to fix the U02A3 OBDII code related to the Particulate Matter Sensor Module in a Chevrolet?

- The cost of repair can vary depending on the exact cause of the issue. It is best to get a diagnostic from a mechanic to determine the specific repairs needed and associated costs.

8. Can a bad Particulate Matter Sensor Module cause the U02A3 OBDII code to appear in my Chevrolet?

- Yes, a malfunctioning or faulty Particulate Matter Sensor Module can indeed trigger the U02A3 code indicating lost communication with the module.

9. Are there any preventive measures I can take to avoid encountering the U02A3 OBDII code in my Chevrolet?

- Regular vehicle maintenance, including checking the wiring harness and connectors for any signs of wear or damage, can help prevent issues leading to the U02A3 code.

10. How long does it typically take to repair the U02A3 OBDII code related to the Particulate Matter Sensor Module in a Chevrolet?

- The repair time can vary based on the specific cause of the issue. Simple fixes like reconnecting loose wiring may take less time, while more complex problems could require more extensive diagnosis and repair.