AutoCodes – Chevrolet – P11C7 2014 Chevrolet Silverado

P11C7 2014 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 2014 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 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)

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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 2014 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 2014 Chevrolet Silverado - NOx Sensor 2 Heater Ground Circuit - AutoCodes.com — P11C7 2014 Chevrolet Silverado Code - NOx Sensor 2 Heater Ground Circuit

What does this mean?

What are the Possible Causes of the DTC P11C7 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P11C7 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11C7 2014 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 2014 Chevrolet Silverado Code

1. What does the OBDII code P11C7 mean on a 2014 Chevrolet Silverado?

P11C7 indicates an issue with the NOx Sensor 2 Heater Ground Circuit, meaning the vehicle's computer has detected a problem with the ground circuit for the heater in the second NOx sensor.

2. What are the symptoms of code P11C7 in a 2014 Chevrolet Silverado?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, possible limp mode activation, and increased NOx emissions.

3. What causes the P11C7 code in a 2014 Chevrolet Silverado?

Possible causes include a damaged NOx sensor, a faulty sensor heater ground circuit, corroded or loose ground connections, or a malfunctioning engine control module (ECM).

4. Can I drive my 2014 Chevrolet Silverado with the P11C7 code?

While the truck may still be drivable, driving with this code can lead to higher emissions, potential damage to the exhaust system, and reduced performance. It's best to address the issue promptly.

5. How do I diagnose the P11C7 code on a 2014 Chevrolet Silverado?

Diagnosis may involve checking the NOx sensor 2 wiring and connections for damage or corrosion, testing the ground circuit for continuity, and verifying the functionality of the sensor heater.

6. How is the P11C7 code fixed on a 2014 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, cleaning or tightening ground connections, or updating/replacing the ECM if necessary.

7. How much does it cost to repair the P11C7 code on a 2014 Chevrolet Silverado?

The cost varies depending on the issue. Replacing a NOx sensor can cost $300â€“$700, while wiring repairs or ECM replacement may increase costs further.

8. What tools are needed to fix the P11C7 code?

Common tools include an OBDII scanner, a multimeter for testing circuits, and basic hand tools for repairing or replacing parts.

9. Can a faulty NOx sensor cause other problems in a 2014 Chevrolet Silverado?

Yes, a faulty NOx sensor can lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter over time.

10. Is the P11C7 code covered under warranty for a 2014 Chevrolet Silverado?

It depends on the vehicle's warranty status and mileage. Emissions-related components like NOx sensors may be covered under an extended emissions warranty. Check with your dealership for details.