AutoCodes – GMC – P11C7 2016 GMC Sierra

P11C7 2016 GMC Sierra 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 GMC Sierra 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.

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Code Popularity 149

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 P11C7 2016 GMC Sierra 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 GMC Sierra - NOx Sensor 2 Heater Ground Circuit - AutoCodes.com — P11C7 2016 GMC Sierra Code - NOx Sensor 2 Heater Ground Circuit

What does this mean?

What are the Possible Causes of the DTC P11C7 2016 GMC Sierra?

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 GMC Sierra?

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 GMC Sierra 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 GMC Sierra code?

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

Need Help with the Code?

Get the P11C7 2016 GMC Sierra 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 GMC Sierra Code

1. What are common symptoms of OBDII code P11C7 in a 2016 GMC Sierra related to NOx Sensor 2 Heater Ground Circuit?

The common symptoms include the check engine light illuminating on the dashboard, reduced engine performance, and possible failed emissions test.

2. What could be causing the OBDII code P11C7 in a 2016 GMC Sierra?

The code P11C7 typically indicates a malfunction in the NOx Sensor 2 Heater Ground Circuit. Possible causes include a faulty NOx sensor, damaged wiring, or a problem with the sensor's heating element.

3. How can I diagnose the issue causing the OBDII code P11C7 in my 2016 GMC Sierra?

Diagnosing the problem requires using an OBDII scanner to retrieve the specific code, checking the wiring harness for any visible damage, and testing the NOx sensor's resistance and heater circuit for proper functioning.

4. What are the recommended steps to repair OBDII code P11C7 in a 2016 GMC Sierra?

To repair the NOx Sensor 2 Heater Ground Circuit issue, you may need to replace the faulty NOx sensor, repair any damaged wiring, or address any issues with the sensor's heating element. It's important to follow the manufacturer's repair procedures.

5. Can I drive my 2016 GMC Sierra with the OBDII code P11C7 related to NOx Sensor 2 Heater Ground Circuit?

It is not recommended to drive your vehicle with an unresolved NOx Sensor 2 Heater Ground Circuit issue as it can lead to reduced engine performance, increased emissions, and potential damage to other components.

6. How much does it typically cost to repair OBDII code P11C7 in a 2016 GMC Sierra?

The cost of repair for OBDII code P11C7 can vary depending on the specific cause of the issue. Replacing a NOx sensor or repairing wiring may range from $200 to $500, including parts and labor.

7. Can a DIY enthusiast fix the OBDII code P11C7 issue in a 2016 GMC Sierra?

While some DIY enthusiasts may have the skills to diagnose and repair simpler automotive issues, fixing the NOx Sensor 2 Heater Ground Circuit problem typically requires specialized tools and expertise. It's advisable to consult a professional mechanic.

8. Will resetting the OBDII code P11C7 in my 2016 GMC Sierra make the issue go away?

Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the NOx Sensor 2 Heater Ground Circuit malfunction. It's essential to address the root cause of the issue.

9. How long does it take to repair OBDII code P11C7 in a 2016 GMC Sierra?

The repair time for OBDII code P11C7 can vary depending on the extent of the issue and the availability of parts. In general, a professional mechanic may take 1-2 hours to diagnose and repair the problem.

10. Are there any recalls or technical service bulletins related to OBDII code P11C7 in a 2016 GMC Sierra?

It's advisable to check with your local GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or technical service bulletins related to the NOx Sensor 2 Heater Ground Circuit issue in your specific vehicle model.