AutoCodes – GMC – P11CC 2014 GMC Sierra

P11CC 2014 GMC Sierra 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 GMC Sierra 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 189

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 2014 GMC Sierra 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 GMC Sierra - Nox Sensor 1 Performance Signal Low - AutoCodes.com — P11CC 2014 GMC Sierra Code - Nox Sensor 1 Performance Signal Low

What does this mean?

What are the Possible Causes of the DTC P11CC 2014 GMC Sierra?

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 GMC Sierra?

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 GMC Sierra 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 GMC Sierra code?

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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 GMC Sierra Code

1. What are the common symptoms of OBDII code P11CC in a 2014 GMC Sierra related to Nox Sensor 1 Performance Signal Low?

- Common symptoms include a check engine light illuminated on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's emission control system.

2. What are the possible causes of OBDII code P11CC in a 2014 GMC Sierra indicating Nox Sensor 1 Performance Signal Low?

- The code P11CC could be triggered by a faulty Nox sensor, wiring issues, sensor contamination, or a problem with the exhaust system.

3. How can I diagnose the OBDII code P11CC in my 2014 GMC Sierra related to Nox Sensor 1 Performance Signal Low?

- Diagnosing the issue involves using an OBDII scanner to read the code, checking the Nox sensor for physical damage or contamination, and inspecting the wiring for any signs of disconnection or damage.

4. Can I drive my 2014 GMC Sierra with the OBDII code P11CC for Nox Sensor 1 Performance Signal Low?

- It is not recommended to continue driving with the code active as it may lead to increased emissions, reduced engine performance, and potential damage to other components.

5. How do I repair the OBDII code P11CC in my 2014 GMC Sierra related to Nox Sensor 1 Performance Signal Low?

- Repairing the issue may involve replacing the Nox sensor, repairing or replacing damaged wiring, and clearing the code with an OBDII scanner after the repair is completed.

6. Are there any tips for preventing the OBDII code P11CC from reoccurring in my 2014 GMC Sierra?

- To prevent the code from reoccurring, it is essential to maintain regular vehicle maintenance, use high-quality fuel, and address any issues related to the emission control system promptly.

7. Will resetting the OBDII code P11CC in my 2014 GMC Sierra fix the issue related to Nox Sensor 1 Performance Signal Low?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the Nox Sensor 1 Performance Signal Low issue.

8. Can a DIY enthusiast repair the OBDII code P11CC in a 2014 GMC Sierra themselves?

- While some DIY enthusiasts may have the skills to replace the Nox sensor or repair wiring issues, it is recommended to consult a professional mechanic for accurate diagnosis and repair of the problem.

9. How much does it typically cost to repair the OBDII code P11CC for Nox Sensor 1 Performance Signal Low in a 2014 GMC Sierra?

- The cost of repairing the issue can vary depending on the specific cause, but it may range from $200 to $500, including parts and labor.

10. Is the OBDII code P11CC related to Nox Sensor 1 Performance Signal Low a common issue in 2014 GMC Sierra vehicles?

- While it may not be one of the most common codes, issues related to Nox sensors and emissions control systems can occur in 2014 GMC Sierra vehicles and should be addressed promptly to maintain optimal vehicle performance.