P30B5 2014 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 2014 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 2014 GMC Sierra Description
What are the Possible Causes of the DTC P30B5 2014 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 2014 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 2014 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 2014 GMC Sierra code?
Need more information on how to fix the P30B5 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P30B5 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P30B5 2014 GMC Sierra Code
1. What does the OBDII code P30B5 mean on a 2014 GMC Sierra?
The P30B5 code indicates that the NOx (Nitrogen Oxide) Sensor 2 has detected an incorrect signal message counter, likely due to communication or sensor issues.
2. What are the common symptoms of code P30B5 in a 2014 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and potential entry into limp mode.
3. What causes the P30B5 code to appear?
The main causes include a faulty NOx Sensor 2, damaged wiring or connectors in the sensor circuit, software glitches in the ECU, or exhaust system issues.
4. How can I diagnose the P30B5 code on my 2014 GMC Sierra?
Start by scanning for codes, visually inspecting the NOx sensor wiring and connectors, testing the sensor with a multimeter, and checking for software updates for the ECU.
5. Can I drive my 2014 GMC Sierra with the P30B5 code?
Driving with this code is not recommended as it may lead to decreased engine performance, higher emissions, or damage to the exhaust aftertreatment system.
6. How do I fix the P30B5 code on a 2014 GMC Sierra?
Repairs may include replacing the faulty NOx Sensor 2, repairing or replacing damaged wiring, updating ECU software, or addressing any exhaust system leaks.
7. How much does it cost to repair the P30B5 code on a GMC Sierra?
Repair costs vary but typically range from $300 to $700 for NOx sensor replacement, depending on parts and labor.
8. Can a faulty NOx sensor cause long-term damage to my 2014 GMC Sierra?
Yes, a faulty NOx sensor can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter or SCR system over time.
9. Do I need to reprogram the ECU after replacing the NOx Sensor 2?
In some cases, after sensor replacement, the ECU may need to be reset or reprogrammed to ensure proper functionality.
10. Can a software update fix the P30B5 code on a 2014 GMC Sierra?
Yes, if the code is caused by a software glitch, updating the ECU software may resolve the issue without requiring sensor replacement.
Discuss the causes and fixes for P30B5 2014 GMC Sierra OBDII Code
Code P30B5 2014 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.
