P30B5 2016 GMC Sierra Code - NOx Sensor 2 Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty NOx Sensor 2, NOx Sensor 2 harness is open or shorted, NOx Sensor 2 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
- P30B5 2016 GMC Sierra indicates NOx Sensor 2 Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty NOx Sensor 2, NOx Sensor 2 harness is open or shorted, NOx Sensor 2 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 P30B5 2016 GMC Sierra Description
What are the Possible Causes of the DTC P30B5 2016 GMC Sierra?
- Faulty NOx Sensor 2
- NOx Sensor 2 harness is open or shorted
- NOx Sensor 2 circuit poor electrical connection
How to Fix the DTC P30B5 2016 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 P30B5 2016 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 P30B5 2016 GMC Sierra code?
Need more information on how to fix the P30B5 2016 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P30B5 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P30B5 2016 GMC Sierra Code
1. What does the OBDII code P30B5 mean for a 2016 GMC Sierra?
The P30B5 code indicates that the NOx Sensor 2 has detected an issue with its signal message counter being incorrect, which affects emissions monitoring.
2. What are the common symptoms of the P30B5 code in a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, reduced engine performance, increased fuel consumption, and possible limp mode activation.
3. What causes the P30B5 code to appear in a 2016 GMC Sierra?
Common causes include a faulty NOx Sensor 2, damaged sensor wiring or connectors, software issues in the engine control module (ECM), or electrical interference in the sensor circuit.
4. Can I drive my 2016 GMC Sierra with the P30B5 code?
While the vehicle may still be drivable, it’s not recommended to ignore this code, as it can lead to higher emissions, reduced fuel efficiency, and potential damage to the emission control system.
5. How do I fix the P30B5 code on my 2016 GMC Sierra?
Repair steps may involve replacing the NOx Sensor 2, repairing or replacing damaged wiring or connectors, and updating the ECM software if necessary.
6. How much does it cost to fix the P30B5 code on a 2016 GMC Sierra?
The cost can vary but typically ranges from $300 to $800, depending on whether the NOx sensor needs replacement or if additional repairs are required.
7. Where is NOx Sensor 2 located on a 2016 GMC Sierra?
NOx Sensor 2 is typically located downstream in the exhaust system, after the diesel particulate filter (DPF).
8. How can I prevent the P30B5 code from occurring again?
Regular maintenance of the exhaust system, using high-quality fuel, and periodically inspecting the NOx sensors and wiring can help prevent this issue.
9. Do I need to clear the P30B5 code after repairs on my 2016 GMC Sierra?
Yes, after completing repairs, the code should be cleared using an OBDII scanner to ensure the issue has been resolved.
10. Can a bad NOx sensor damage my 2016 GMC Sierra’s engine?
While a bad NOx sensor won’t directly damage the engine, it can lead to poor performance and increased stress on the emission control system over time.
Discuss the causes and fixes for P30B5 2016 GMC Sierra OBDII Code
Code P30B5 2016 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
