U02A3 2017 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 2017 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.
Code U02A3 2017 GMC Sierra Description
What are the Possible Causes of the DTC U02A3 2017 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 2017 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 2017 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.
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Frequently Asked Questions about U02A3 2017 GMC Sierra Code
1. What does the OBDII code U02A3 mean on a 2017 GMC Sierra?
The U02A3 code indicates a loss of communication with the particulate matter sensor module, which monitors and reports the level of soot in the exhaust system.
2. What are the common symptoms of code U02A3 on a 2017 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, potential limp mode activation, or issues with the diesel particulate filter (DPF) regeneration process.
3. What causes the U02A3 code to appear on a 2017 GMC Sierra?
This code is typically caused by a faulty particulate matter sensor, damaged or corroded wiring, a poor electrical connection, or an issue with the powertrain control module (PCM).
4. Can I drive my 2017 GMC Sierra with the U02A3 code active?
Driving with this code is not recommended as it may lead to further complications with the DPF system or reduced engine performance.
5. How can I diagnose the U02A3 code on my 2017 GMC Sierra?
Start by checking the wiring and connectors to the particulate matter sensor for damage or corrosion, then use a scan tool to verify communication with the sensor module.
6. How is the U02A3 code fixed on a 2017 GMC Sierra?
Repairs may involve replacing the particulate matter sensor, repairing or replacing damaged wiring, or updating or reprogramming the PCM if necessary.
7. What tools are needed to troubleshoot the U02A3 code?
A diagnostic scan tool, multimeter, and access to the vehicle’s wiring diagram are typically needed to troubleshoot this code effectively.
8. Does the U02A3 code affect DPF regeneration on a 2017 GMC Sierra?
Yes, this code can disrupt the DPF regeneration process, potentially leading to excessive soot buildup and reduced engine performance over time.
9. Is the U02A3 code covered under warranty for a 2017 GMC Sierra?
This depends on your vehicle’s warranty terms, but emissions-related components like the particulate matter sensor may be covered under the emissions warranty.
10. Can a software issue cause the U02A3 code on a 2017 GMC Sierra?
Yes, a glitch or outdated software in the PCM can sometimes trigger this code, requiring a software update or reprogramming to resolve the issue.
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