AutoCodes – Chevrolet – P11DC 2016 Chevrolet Silverado

P11DC 2016 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 2016 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 477

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 2016 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 2016 Chevrolet Silverado - NOx Sensor 2 Current Performance - AutoCodes.com — P11DC 2016 Chevrolet Silverado Code - NOx Sensor 2 Current Performance

What does this mean?

What are the Possible Causes of the DTC P11DC 2016 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 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 P11DC 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 P11DC 2016 Chevrolet Silverado code?

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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 2016 Chevrolet Silverado Code

1. What does the OBDII code P11DC for NOx Sensor 2 Current Performance mean on a 2016 Chevrolet Silverado?

The code P11DC indicates that there is a current performance issue with the NOx Sensor 2 in your 2016 Chevrolet Silverado.

2. What are the common symptoms of a NOx Sensor 2 Current Performance issue in a 2016 Chevrolet Silverado?

Common symptoms of a NOx Sensor 2 Current Performance problem may include reduced fuel efficiency, decreased engine performance, and illuminated check engine light.

3. What are the possible causes of the P11DC OBDII code on a 2016 Chevrolet Silverado?

Potential causes of the P11DC code on a 2016 Chevrolet Silverado include a faulty NOx Sensor 2, wiring issues, or problems with the engine control module.

4. How can I diagnose a NOx Sensor 2 Current Performance problem on my 2016 Chevrolet Silverado?

Diagnosing a NOx Sensor 2 Current Performance issue typically involves using an OBDII scanner to read the trouble codes, checking the sensor's wiring for damage, and testing the sensor's functionality.

5. Can I continue driving my 2016 Chevrolet Silverado with the P11DC code for NOx Sensor 2 Current Performance?

It is not recommended to drive your vehicle for an extended period with the P11DC code present, as it can lead to further engine damage and increased emissions.

6. How can I repair a NOx Sensor 2 Current Performance issue on my 2016 Chevrolet Silverado?

Repairing a NOx Sensor 2 Current Performance problem usually involves replacing the faulty sensor, repairing any damaged wiring, and clearing the trouble codes with an OBDII scanner.

7. Are there any preventative measures I can take to avoid the P11DC OBDII code on my 2016 Chevrolet Silverado?

Regularly maintaining your vehicle, including scheduled inspections and replacing sensors as recommended, can help prevent NOx sensor issues and related trouble codes.

8. Can a DIY enthusiast replace the NOx Sensor 2 in a 2016 Chevrolet Silverado to resolve the P11DC code?

While some experienced DIY enthusiasts may be able to replace the NOx Sensor 2 themselves, it is recommended to consult a professional mechanic for proper installation and calibration.

9. How much does it typically cost to repair a NOx Sensor 2 Current Performance issue on a 2016 Chevrolet Silverado?

The cost of repairing a NOx Sensor 2 Current Performance problem can vary depending on the severity of the issue, but it may range from $200 to $500 including parts and labor.

10. Will resetting the check engine light resolve the P11DC code related to the NOx Sensor 2 Current Performance on a 2016 Chevrolet Silverado?

Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue with the NOx Sensor 2 Current Performance is not addressed.