AutoCodes – Chevrolet – P11CC 2014 Chevrolet Silverado

P11CC 2014 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 2014 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 325

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
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Code P11CC 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 P11CC 2014 Chevrolet Silverado - Nox Sensor 1 Performance Signal Low - AutoCodes.com — P11CC 2014 Chevrolet Silverado Code - Nox Sensor 1 Performance Signal Low

What does this mean?

What are the Possible Causes of the DTC P11CC 2014 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 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 P11CC 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 P11CC 2014 Chevrolet Silverado code?

Need more information on how to fix the P11CC 2014 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 2014 Chevrolet Silverado Code

What does the OBDII code P11CC mean on a 2014 Chevrolet Silverado?

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

What are the common symptoms of the P11CC code?

Symptoms include a check engine light, reduced fuel efficiency, potential emissions test failure, and, in some cases, reduced engine performance.

What causes the P11CC code to appear on a 2014 Chevrolet Silverado?

Common causes include a faulty NOx sensor, wiring issues, a damaged sensor connector, or software-related problems in the engine control module (ECM).

Can I drive my 2014 Silverado with the P11CC code?

While the truck may still be drivable, ignoring the issue can lead to increased emissions, poor fuel economy, and potential damage to the emissions system.

How do you diagnose the P11CC code?

Start by using a scan tool to confirm the code, inspect the NOx sensor and its wiring for damage, and test the sensorâ€™s performance using a multimeter or advanced diagnostics.

How is the P11CC code typically repaired?

Repairs may involve replacing the faulty NOx Sensor 1, repairing or replacing damaged wiring or connectors, or updating the ECM software if needed.

How much does it cost to fix a P11CC code?

The cost varies but typically ranges from $300 to $700, depending on whether the NOx sensor needs replacement and labor charges.

Can a dirty exhaust system cause the P11CC code?

Yes, excessive soot or contamination in the exhaust can affect the NOx sensorâ€™s ability to function correctly, potentially triggering the code.

Is the P11CC code covered under warranty for a 2014 Chevrolet Silverado?

It depends on the vehicleâ€™s mileage and warranty terms, but emissions-related components like NOx sensors may be covered under the federally mandated emissions warranty.

Can updating the ECM software fix the P11CC code?

In some cases, a software update from the manufacturer can resolve sensor calibration or communication issues related to this code.