AutoCodes – Chevrolet – P11C6 2016 Chevrolet Silverado

P11C6 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Ground Circuit High

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, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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: P11C6 2016 Chevrolet Silverado indicates NOx Sensor 1 Heater Ground Circuit High.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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 203

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 P11C6 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 P11C6 2016 Chevrolet Silverado - NOx Sensor 1 Heater Ground Circuit High - AutoCodes.com — P11C6 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Ground Circuit High

What does this mean?

What are the Possible Causes of the DTC P11C6 2016 Chevrolet Silverado?

Faulty Nitrogen Oxides (NOx) Sensor
Nitrogen Oxides Sensor harness is open or shorted
Nitrogen Oxides Sensor circuit poor electrical connection

How to Fix the DTC P11C6 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 P11C6 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 P11C6 2016 Chevrolet Silverado code?

Need more information on how to fix the P11C6 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11C6 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 P11C6 2016 Chevrolet Silverado Code

1. What does the OBDII code P11C6 mean on a 2016 Chevrolet Silverado?

The P11C6 code indicates a problem with the NOx Sensor 1 Heater Ground Circuit, where the circuit is reading a high voltage, suggesting an electrical issue.

2. What are the symptoms of the P11C6 code in a 2016 Chevrolet Silverado?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and potentially entering into a limp mode.

3. What causes the P11C6 code in a 2016 Chevrolet Silverado?

Common causes include a faulty NOx sensor, damaged or corroded wiring, a poor ground connection, or an issue with the engine control module (ECM).

4. Can a bad NOx sensor trigger the P11C6 code?

Yes, a malfunctioning NOx sensor or its heater circuit can trigger the P11C6 code due to improper operation or electrical faults.

5. How do you diagnose the P11C6 code on a 2016 Chevrolet Silverado?

Diagnosis involves using a scan tool to confirm the code, visually inspecting the sensor wiring and connections, checking the ground circuit, and testing the NOx sensor heater resistance.

6. Is it safe to drive with the P11C6 code active?

Itâ€™s not recommended to drive for extended periods with this code active, as it can lead to reduced performance, higher emissions, and potential damage to the vehicleâ€™s exhaust system.

7. How do you fix the P11C6 code on a 2016 Chevrolet Silverado?

Repairs may include replacing the faulty NOx sensor, repairing or replacing damaged wiring, cleaning or securing ground connections, or updating/reprogramming the ECM.

8. What tools are needed to fix the P11C6 code?

Youâ€™ll need an OBDII scan tool, a multimeter to test wiring and connections, and potentially a socket set to remove and replace the NOx sensor.

9. How much does it cost to repair the P11C6 code on a 2016 Chevrolet Silverado?

Repair costs vary, but replacing the NOx sensor typically costs $200-$500, while wiring or ground repairs may be less expensive depending on the extent of the damage.

10. Can a software update fix the P11C6 code?

In some cases, if the ECM software is outdated or has a known bug, a reprogramming or update may resolve the issue, but physical repairs are often needed.