AutoCodes – Chevrolet – P11C7 2017 Chevrolet Silverado

P11C7 2017 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 2017 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.

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Code Popularity 1,464

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 2017 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 2017 Chevrolet Silverado - NOx Sensor 2 Heater Ground Circuit - AutoCodes.com — P11C7 2017 Chevrolet Silverado Code - NOx Sensor 2 Heater Ground Circuit

What does this mean?

What are the Possible Causes of the DTC P11C7 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P11C7 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11C7 2017 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 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P11C7 on a 2017 Chevrolet Silverado related to the NOx Sensor 2 Heater Ground Circuit?

- Common symptoms include illuminated check engine light, reduced engine performance, and potential failure to pass emissions tests.

2. What are the possible causes of OBDII code P11C7 on a 2017 Chevrolet Silverado?

- Potential causes may include a faulty NOx sensor, damaged wiring or connectors, a malfunctioning heater element, or issues with the ground circuit.

3. How can I diagnose the NOx Sensor 2 Heater Ground Circuit issue triggering OBDII code P11C7 on my 2017 Chevrolet Silverado?

- Diagnosis involves using an OBDII scanner to read the code, inspecting the sensor and its connections for damage, and testing the electrical components for proper functionality.

4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P11C7 related to the NOx Sensor 2 Heater Ground Circuit issue?

- It is not recommended to drive the vehicle for an extended period with this issue, as it may lead to increased emissions, reduced fuel efficiency, and potential damage to other engine components.

5. How can I repair OBDII code P11C7 on my 2017 Chevrolet Silverado due to NOx Sensor 2 Heater Ground Circuit problems?

- Repair typically involves replacing the NOx sensor, repairing or replacing damaged wiring or connectors, checking and repairing the heater element, and ensuring the ground circuit is functioning correctly.

6. Is it possible to reset the check engine light after fixing the NOx Sensor 2 Heater Ground Circuit issue causing OBDII code P11C7 on my 2017 Chevrolet Silverado?

- Yes, after the repair is completed, the check engine light can be reset using an OBDII scanner to clear the stored fault code.

7. Are there any preventive measures to avoid encountering OBDII code P11C7 on a 2017 Chevrolet Silverado in the future?

- Regular vehicle maintenance, including checking and replacing sensors as recommended by the manufacturer, can help prevent issues like the NOx Sensor 2 Heater Ground Circuit problem.

8. Can a DIY enthusiast with automotive repair knowledge fix the NOx Sensor 2 Heater Ground Circuit issue causing OBDII code P11C7 on a 2017 Chevrolet Silverado?

- Depending on the individual's skills and tools available, some DIY enthusiasts may be able to address this issue, but it is recommended to consult a professional mechanic for accurate diagnosis and repair.

9. How long does it typically take to repair the NOx Sensor 2 Heater Ground Circuit issue leading to OBDII code P11C7 on a 2017 Chevrolet Silverado?

- The repair time can vary based on the extent of the issue and the availability of parts, but it may take a few hours to a full day to complete the necessary repairs.

10. Will fixing the NOx Sensor 2 Heater Ground Circuit issue causing OBDII code P11C7 on my 2017 Chevrolet Silverado improve the vehicle's overall performance?

- Yes, resolving this issue can help restore engine performance, fuel efficiency, and emissions compliance, leading to better overall performance of the vehicle.