AutoCodes – Chevrolet – P11DC 2015 Chevrolet Silverado

P11DC 2015 Chevrolet Silverado Code - NOx Sensor 2 Current Performance

Quick Answer

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides 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: P11DC 2015 Chevrolet Silverado indicates NOx Sensor 2 Current Performance.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides 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 704

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 Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P11DC 2015 Chevrolet Silverado Description

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the Engine Control Module (ECM). Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within the sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set if the ECM software detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for greater than 2 s.

OBDII Code P11DC 2015 Chevrolet Silverado - NOx Sensor 2 Current Performance - AutoCodes.com — P11DC 2015 Chevrolet Silverado Code - NOx Sensor 2 Current Performance

What does this mean?

What are the Possible Causes of the DTC P11DC 2015 Chevrolet Silverado?

Faulty Nitrogen Oxides (NOx) Sensor 2
Nitrogen Oxides Sensor 2 harness is open or shorted
Nitrogen Oxides Sensor 2 circuit poor electrical connection

How to Fix the DTC P11DC 2015 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 P11DC 2015 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 P11DC 2015 Chevrolet Silverado code?

Need more information on how to fix the P11DC 2015 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 P11DC 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P11DC in a 2015 Chevrolet Silverado related to NOx Sensor 2 Current Performance?

The common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P11DC in a 2015 Chevrolet Silverado?

Possible causes include a faulty NOx sensor, wiring issues, exhaust system leaks, or a malfunctioning engine control module.

3. How can I diagnose the OBDII code P11DC in my 2015 Chevrolet Silverado?

Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the NOx sensor and related wiring, and checking for exhaust leaks.

4. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P11DC?

It is not recommended to continue driving with this code as it can lead to further damage to the engine and emissions control system. Prompt diagnosis and repair are advised.

5. How can I repair OBDII code P11DC in my 2015 Chevrolet Silverado?

Repair typically involves replacing the faulty NOx sensor, repairing any wiring issues, fixing exhaust leaks, and resetting the check engine light with an OBDII scanner.

6. Is it possible to reset the OBDII code P11DC in a 2015 Chevrolet Silverado without fixing the underlying issue?

While you can clear the code with an OBDII scanner, it will likely reappear if the root cause is not addressed. It's important to fix the problem to prevent further issues.

7. Are there any maintenance tips to prevent OBDII code P11DC in a 2015 Chevrolet Silverado?

Regularly servicing your vehicle, including checking the exhaust system and sensors, can help prevent issues that may trigger this code.

8. Can a DIY enthusiast repair OBDII code P11DC in a 2015 Chevrolet Silverado?

While some may attempt the repair, diagnosing and fixing this code often requires specialized tools and knowledge. It may be best to consult a professional mechanic.

9. How long does it typically take to repair OBDII code P11DC in a 2015 Chevrolet Silverado?

The repair time can vary depending on the exact issue, but it may take a few hours to a day to diagnose, repair, and reset the code.

10. Will fixing OBDII code P11DC improve the performance and fuel efficiency of my 2015 Chevrolet Silverado?

Yes, addressing this code can help restore optimal engine performance and fuel efficiency by ensuring proper NOx sensor operation and emissions control.