AutoCodes – Chevrolet – P11CC 2015 Chevrolet Silverado

P11CC 2015 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 2015 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 331

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 2015 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 2015 Chevrolet Silverado - Nox Sensor 1 Performance Signal Low - AutoCodes.com — P11CC 2015 Chevrolet Silverado Code - Nox Sensor 1 Performance Signal Low

What does this mean?

What are the Possible Causes of the DTC P11CC 2015 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 2015 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 2015 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P11CC 2015 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 2015 Chevrolet Silverado Code

1. What does the OBDII code P11CC mean on a 2015 Chevrolet Silverado?

P11CC indicates that the ECM has detected a low performance signal from NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust system.

2. What are the common symptoms of code P11CC in a 2015 Chevrolet Silverado?

Symptoms may include reduced fuel efficiency, a check engine light, poor engine performance, or the vehicle entering limp mode.

3. What causes the P11CC code to appear in a 2015 Chevrolet Silverado?

Common causes include a faulty NOx sensor, damaged wiring or connectors, exhaust leaks, or issues with the diesel exhaust fluid (DEF) system.

4. Can a bad NOx sensor cause the P11CC code?

Yes, a malfunctioning NOx Sensor 1 is one of the primary causes of the P11CC code being triggered.

5. How can I diagnose the P11CC code on my Silverado?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the NOx sensor and its wiring, checking for exhaust leaks, and testing the DEF system.

6. Can I drive my 2015 Silverado with the P11CC code?

Itâ€™s not recommended to drive for long periods with this code, as it can lead to poor performance, increased emissions, and potential damage to the exhaust system.

7. How do I fix the P11CC code on a 2015 Chevrolet Silverado?

Repairs may include replacing the NOx Sensor 1, repairing damaged wiring or connectors, fixing exhaust leaks, or addressing DEF system issues.

8. How much does it cost to repair a P11CC code on a 2015 Chevrolet Silverado?

The cost can vary but typically ranges from $300 to $800, depending on whether the NOx sensor needs replacement or other repairs are required.

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

In some cases, a software update to the ECM may resolve the issue, but this is less common and depends on the vehicleâ€™s history and manufacturer recommendations.

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

Regular maintenance of the DEF system, ensuring proper sensor function, and addressing exhaust issues promptly can help prevent this code from reappearing.