AutoCodes – Chevrolet – P11CC Chevrolet

P11CC Chevrolet 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 Chevrolet 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 5,832

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 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P11CC Chevrolet 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 Chevrolet - Nox Sensor 1 Performance Signal Low - AutoCodes.com — P11CC Chevrolet Code - Nox Sensor 1 Performance Signal Low

What does this mean?

What are the Possible Causes of the DTC P11CC Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P11CC Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P11CC 2014 Chevrolet Silverado — Nox Sensor 1 Performance Signal Low
P11CC 2015 Chevrolet Silverado — Nox Sensor 1 Performance Signal Low
P11CC 2016 Chevrolet Silverado — Nox Sensor 1 Performance Signal Low
P11CC 2017 Chevrolet Silverado — Nox Sensor 1 Performance Signal Low
P11CC 2018 Chevrolet Silverado — Nox Sensor 1 Performance Signal Low

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 Chevrolet Code

1. What are the common symptoms of OBDII code P11CC in a Chevrolet related to Nox Sensor 1 performance signal low?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of the P11CC code in a Chevrolet indicating Nox Sensor 1 performance signal low?

- The code may be triggered by a faulty Nox sensor, wiring issues, sensor signal interference, or a malfunctioning engine control module (ECM).

3. How can I diagnose the OBDII code P11CC related to Nox Sensor 1 performance signal low in my Chevrolet?

- Diagnose the issue by using an OBDII scanner to retrieve the code, inspect the Nox sensor wiring for damage, and perform a sensor signal test using a multimeter.

4. Can I continue driving my Chevrolet with the P11CC code indicating Nox Sensor 1 performance signal low?

- It is not recommended to drive the vehicle with the P11CC code present, as it can lead to further damage and potentially affect vehicle performance.

5. What are the repair options for addressing OBDII code P11CC related to Nox Sensor 1 performance signal low in a Chevrolet?

- Repair options include replacing the Nox sensor, repairing any damaged wiring, ensuring proper sensor connections, and resetting the ECM to clear the code.

6. How much does it typically cost to repair the P11CC code indicating Nox Sensor 1 performance signal low in a Chevrolet?

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

7. Are there any preventive measures to avoid encountering the OBDII code P11CC related to Nox Sensor 1 performance signal low in a Chevrolet?

- Regular maintenance, such as checking and cleaning the sensor connections, inspecting wiring for damage, and using high-quality fuel, can help prevent this issue.

8. Can a DIY enthusiast effectively address the P11CC code indicating Nox Sensor 1 performance signal low in a Chevrolet?

- Depending on the skill level and experience, some DIY enthusiasts may be able to address the issue by following repair guides and using the necessary tools.

9. Will resetting the check engine light resolve the OBDII code P11CC for Nox Sensor 1 performance signal low in a Chevrolet?

- While resetting the check engine light may temporarily turn it off, it will not fix the underlying issue triggering the P11CC code. Proper diagnosis and repair are necessary.

10. Is it necessary to visit a dealership or a mechanic immediately after the P11CC code appears for Nox Sensor 1 performance signal low in a Chevrolet?

- It is recommended to address the issue promptly to prevent further damage to the vehicle. Visiting a dealership or a qualified mechanic can help diagnose and repair the problem effectively.