AutoCodes – Chevrolet – P30D5 2014 Chevrolet Silverado

P30D5 2014 Chevrolet Silverado Code - NOx Sensor 3 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 3, NOx Sensor 3 harness is open or shorted, NOx Sensor 3 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: P30D5 2014 Chevrolet Silverado indicates NOx Sensor 3 Signal Message Counter Incorrect.
Common causes: Common causes include Faulty NOx Sensor 3, NOx Sensor 3 harness is open or shorted, NOx Sensor 3 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 308

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 P30D5 2014 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 3 Signal Message Counter is Incorrect.

OBDII Code P30D5 2014 Chevrolet Silverado - NOx Sensor 3 Signal Message Counter Incorrect - AutoCodes.com — P30D5 2014 Chevrolet Silverado Code - NOx Sensor 3 Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P30D5 2014 Chevrolet Silverado?

Faulty NOx Sensor 3
NOx Sensor 3 harness is open or shorted
NOx Sensor 3 circuit poor electrical connection

How to Fix the DTC P30D5 2014 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 P30D5 2014 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 P30D5 2014 Chevrolet Silverado code?

Need more information on how to fix the P30D5 2014 Chevrolet Silverado 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 P30D5 2014 Chevrolet Silverado Code

1. What does the OBDII code P30D5 mean on a 2014 Chevrolet Silverado?

The code P30D5 indicates that the NOx Sensor 3 has detected an issue with its signal message counter, meaning the data being transmitted is inconsistent or incorrect.

2. What are the symptoms of code P30D5 on a 2014 Chevrolet Silverado?

Common symptoms include a check engine light, reduced engine performance, decreased fuel efficiency, and possible issues with emissions system performance.

3. What causes the P30D5 code to appear?

The main causes include a faulty NOx Sensor 3, damaged wiring or connectors, issues with the sensor's communication with the ECM, or software glitches in the engine control module.

4. How do I troubleshoot the P30D5 code on my Silverado?

Start by inspecting the NOx Sensor 3 and its wiring for damage or corrosion. Use a scan tool to check sensor data and update the ECM software if necessary. If the issue persists, the sensor may need replacement.

5. Can I drive my 2014 Silverado with the P30D5 code active?

While it may still be drivable, prolonged use with this code can lead to increased emissions, reduced engine performance, and potential damage to other components.

6. How do I fix the P30D5 code on a 2014 Chevrolet Silverado?

Repairs may include replacing the NOx Sensor 3, repairing damaged wiring, cleaning sensor connectors, or updating the ECM software.

7. How much does it cost to fix the P30D5 code on a Silverado?

The cost varies, but replacing a NOx sensor typically ranges from $300 to $500, including parts and labor. Additional repairs, such as wiring fixes, may increase the price.

8. Is the P30D5 code related to emissions testing?

Yes, it can cause your vehicle to fail an emissions test since the NOx sensor is critical for monitoring and controlling nitrogen oxide emissions.

9. How can I prevent the P30D5 code from reoccurring?

Regular maintenance, such as inspecting wiring and connectors and ensuring software updates are applied, can help prevent this code from reoccurring.

10. Does the P30D5 code mean the NOx Sensor 3 is always bad?

Not necessarily. The code could also be triggered by wiring issues, a communication error with the ECM, or outdated software, so further diagnosis is needed.