AutoCodes – Chevrolet – P11C7 2016 Chevrolet Silverado

P11C7 2016 Chevrolet Silverado Code - NOx Sensor 2 Heater Ground Circuit

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: P11C7 2016 Chevrolet Silverado indicates NOx Sensor 2 Heater Ground Circuit.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 218

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P11C7 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 P11C7 2016 Chevrolet Silverado - NOx Sensor 2 Heater Ground Circuit - AutoCodes.com — P11C7 2016 Chevrolet Silverado Code - NOx Sensor 2 Heater Ground Circuit

What does this mean?

What are the Possible Causes of the DTC P11C7 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 P11C7 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 P11C7 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 P11C7 2016 Chevrolet Silverado code?

Need more information on how to fix the P11C7 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11C7 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 P11C7 2016 Chevrolet Silverado Code

1. What does the OBDII code P11C7 mean on a 2016 Chevrolet Silverado?

P11C7 indicates an issue with the NOx Sensor 2 Heater Ground Circuit, which affects the functionality of the heater in the second NOx sensor.

2. What are the common symptoms of a P11C7 code in a 2016 Chevrolet Silverado?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, poor engine performance, or the vehicle entering limp mode.

3. What causes the P11C7 code to appear on a 2016 Chevrolet Silverado?

Common causes include a damaged NOx sensor, a faulty heater circuit, corroded or loose wiring, or a problem with the engine control module (ECM).

4. Can I drive my 2016 Chevrolet Silverado with a P11C7 code?

While the vehicle may still be drivable, it is not recommended as the malfunction can lead to increased emissions and potential damage to the emissions system.

5. How is the P11C7 code diagnosed on a 2016 Chevrolet Silverado?

A technician will use a scan tool to confirm the code, inspect the NOx sensor and its wiring, and test the heater circuit for proper voltage and ground connections.

6. How do you fix the P11C7 code on a 2016 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, or addressing any issues with the ECM.

7. How much does it cost to repair a P11C7 code on a 2016 Chevrolet Silverado?

The cost depends on the issue, but replacing a NOx sensor can range from $300 to $800, including parts and labor.

8. What is the purpose of the NOx Sensor 2 Heater in a 2016 Chevrolet Silverado?

The heater ensures the NOx sensor operates effectively by maintaining the proper temperature to measure nitrogen oxide levels in the exhaust.

9. Can a P11C7 code affect my vehicle's emissions test?

Yes, a P11C7 code can cause your vehicle to fail an emissions test due to increased nitrogen oxide levels.

10. Is it necessary to replace both NOx sensors when repairing a P11C7 code?

Itâ€™s not always necessary to replace both sensors, but if the other NOx sensor is aging or malfunctioning, it may be wise to replace them together to avoid future issues.