AutoCodes – Chevrolet – P11CC 2017 Chevrolet Silverado

P11CC 2017 Chevrolet Silverado Code - Nox Sensor 1 Performance Signal Low

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: P11CC 2017 Chevrolet Silverado indicates Nox Sensor 1 Performance Signal Low.
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 460

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 P11CC 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 P11CC 2017 Chevrolet Silverado - Nox Sensor 1 Performance Signal Low - AutoCodes.com — P11CC 2017 Chevrolet Silverado Code - Nox Sensor 1 Performance Signal Low

What does this mean?

What are the Possible Causes of the DTC P11CC 2017 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 P11CC 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 P11CC 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 P11CC 2017 Chevrolet Silverado code?

Need more information on how to fix the P11CC 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P11CC 2017 Chevrolet Silverado Code

1. What does the OBDII code P11CC mean on a 2017 Chevrolet Silverado?

P11CC indicates a performance issue with NOx Sensor 1, where its signal is reading lower than expected, affecting emissions system efficiency.

2. What are the symptoms of the P11CC code on a 2017 Silverado?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, poor engine performance, and potential difficulty passing emissions tests.

3. What causes the P11CC code to appear?

The P11CC code can be triggered by a faulty NOx sensor, wiring issues, excessive soot buildup, or issues with the diesel exhaust fluid (DEF) system.

4. Can a dirty or faulty NOx sensor cause the P11CC code?

Yes, a dirty or malfunctioning NOx sensor can cause incorrect readings, leading to the P11CC code.

5. How do you diagnose the P11CC code on a 2017 Silverado?

Diagnosis involves scanning for related codes, inspecting the NOx sensor and wiring for damage, and testing the DEF system for proper operation.

6. Can driving with the P11CC code damage the vehicle?

While the vehicle may still drive, ignoring the P11CC code can lead to increased emissions and potential long-term damage to the exhaust system.

7. How do you fix the P11CC code on a 2017 Chevy Silverado?

Repairs may include replacing the NOx sensor, cleaning or replacing wiring/connectors, or addressing DEF system issues like low fluid quality.

8. How much does it cost to repair the P11CC code on a Silverado?

The cost can range from $300 to $800, depending on whether the NOx sensor or other components require replacement.

9. Can a software update fix the P11CC code on my Silverado?

In some cases, a software update from the dealership may resolve the issue if it's caused by incorrect sensor calibration.

10. How can I prevent the P11CC code from recurring?

Regular maintenance of the DEF system, using high-quality DEF fluid, and addressing check engine light issues promptly can help prevent the P11CC code.