AutoCodes – Chevrolet – P30B5 2016 Chevrolet Silverado

P30B5 2016 Chevrolet Silverado 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 Chevrolet Silverado 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.

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Code Popularity 319

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P30B5 2016 Chevrolet Silverado Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the NOx Sensor 2 Signal Message Counter is Incorrect.

OBDII Code P30B5 2016 Chevrolet Silverado - NOx Sensor 2 Signal Message Counter Incorrect - AutoCodes.com — P30B5 2016 Chevrolet Silverado Code - NOx Sensor 2 Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P30B5 2016 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

Need more information on how to fix the P30B5 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P30B5 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P30B5 2016 Chevrolet Silverado Code

1. What does the OBDII code P30B5 mean for a 2016 Chevrolet Silverado?

P30B5 indicates that the NOx sensor 2 (located downstream) is reporting an incorrect signal message counter, meaning the sensor is not functioning properly or communication is disrupted.

2. What are the symptoms of code P30B5 in a 2016 Chevrolet Silverado?

Common symptoms include the illumination of the check engine light, reduced fuel efficiency, possible engine derate mode, and increased emissions.

3. What causes the P30B5 code in a Chevrolet Silverado?

Causes can include a faulty NOx sensor 2, wiring or connection issues, software glitches in the ECU, or contamination of the sensor due to excessive soot or debris.

4. How do you diagnose the P30B5 code in a 2016 Silverado?

Diagnosis involves scanning for codes, inspecting the NOx sensor and its wiring, performing a continuity test on the circuit, and verifying sensor operation using a diagnostic tool.

5. Can you drive a 2016 Chevrolet Silverado with the P30B5 code active?

While the vehicle may still be drivable, it is not recommended as the issue can lead to reduced performance, higher emissions, and potential damage to other emissions components.

6. How do you fix the P30B5 code on a 2016 Silverado?

Repairs may include replacing the NOx sensor 2, repairing or replacing damaged wiring or connectors, and updating the vehicleâ€™s ECU software if necessary.

7. How much does it cost to repair the P30B5 code on a Chevrolet Silverado?

The cost can vary, but replacing a NOx sensor typically ranges from $300 to $700, including parts and labor. Additional repairs, if needed, may increase the total.

8. Can a dirty or clogged NOx sensor cause the P30B5 code?

Yes, a dirty or clogged NOx sensor can cause incorrect readings and communication errors, potentially triggering the P30B5 code.

9. Is it necessary to reprogram the ECU after fixing the P30B5 code?

In some cases, an ECU software update or reset may be required to clear the code and ensure proper communication with the new or repaired NOx sensor.

10. How can you prevent the P30B5 code from recurring in a 2016 Silverado?

Regular maintenance, using quality diesel fuel, and keeping the exhaust system clean can help prevent premature NOx sensor failure and reduce the likelihood of the P30B5 code.