AutoCodes – GMC – U02A3 2015 GMC Sierra

U02A3 2015 GMC Sierra 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 2015 GMC Sierra 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 166

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 2015 GMC Sierra 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 2015 GMC Sierra - Lost Communication With Particulate Matter Sensor Module - AutoCodes.com — U02A3 2015 GMC Sierra Code - Lost Communication With Particulate Matter Sensor Module

What does this mean?

What are the Possible Causes of the DTC U02A3 2015 GMC Sierra?

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 2015 GMC Sierra?

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 2015 GMC Sierra 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 2015 GMC Sierra code?

Need more information on how to fix the U02A3 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 U02A3 2015 GMC Sierra Code

1. What are common symptoms of OBDII code U02A3 in a 2015 GMC Sierra related to lost communication with the Particulate Matter Sensor Module?

- Common symptoms may include illuminated check engine light, reduced engine performance, and possible issues with the vehicle's emissions system.

2. What are some possible causes of the U02A3 code in a 2015 GMC Sierra?

- Possible causes may include faulty wiring or connectors related to the Particulate Matter Sensor Module, a malfunctioning sensor module, or issues with the vehicle's powertrain control module.

3. How can I diagnose the U02A3 code in my 2015 GMC Sierra?

- Diagnosing the U02A3 code typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connectors for any damage or corrosion, and testing the Particulate Matter Sensor Module for proper functionality.

4. Can I continue driving my 2015 GMC Sierra with the U02A3 code present?

- It is not recommended to drive your vehicle with the U02A3 code active, as it can lead to potential issues with emissions compliance and engine performance. It is advisable to address the issue promptly.

5. How can I repair the U02A3 code in my 2015 GMC Sierra?

- Repairing the U02A3 code may involve replacing damaged wiring or connectors, repairing or replacing the Particulate Matter Sensor Module, or reprogramming the powertrain control module as needed.

6. Is it possible to reset the U02A3 code in my 2015 GMC Sierra without fixing the underlying issue?

- While clearing the fault code may temporarily turn off the check engine light, the underlying issue causing the U02A3 code will persist. It is recommended to address the root cause of the problem for a permanent solution.

7. Are there any recalls or technical service bulletins related to the U02A3 code in a 2015 GMC Sierra?

- It is advisable to check with your local GMC dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins related to the U02A3 code in your specific vehicle.

8. Can a DIY enthusiast repair the U02A3 code in a 2015 GMC Sierra?

- Depending on your level of automotive expertise, you may be able to diagnose and repair the U02A3 code yourself. However, complex electrical issues may require professional assistance.

9. How much does it typically cost to repair the U02A3 code in a 2015 GMC Sierra?

- The cost of repairing the U02A3 code can vary depending on the specific issue causing the fault code, the labor rates in your area, and whether you choose to use OEM or aftermarket parts for the repair.

10. Will fixing the U02A3 code improve the overall performance and fuel efficiency of my 2015 GMC Sierra?

- Addressing the U02A3 code and restoring proper communication with the Particulate Matter Sensor Module can help ensure optimal engine performance, emissions compliance, and fuel efficiency in your vehicle.