AutoCodes – Chevrolet – P2211 2016 Chevrolet Silverado

P2211 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit Low Voltage

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: P2211 2016 Chevrolet Silverado indicates NOx Sensor 1 Heater Feedback Circuit Low Voltage.
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 240

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 P2211 2016 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 P2211 2016 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit Low Voltage - AutoCodes.com — P2211 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2211 2016 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 P2211 2016 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 P2211 2016 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 P2211 2016 Chevrolet Silverado code?

Need more information on how to fix the P2211 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2211 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P2211 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2211 in a 2016 Chevrolet Silverado related to the NOx Sensor 1 Heater Feedback Circuit Low Voltage?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine light.

2. What are the potential causes of OBDII code P2211 in a 2016 Chevrolet Silverado?

- The code P2211 can be triggered by issues such as a faulty NOx sensor, damaged wiring or connectors, or a malfunctioning NOx sensor heater.

3. How can I diagnose the NOx Sensor 1 Heater Feedback Circuit Low Voltage issue in my 2016 Chevrolet Silverado?

- Diagnosing the problem involves using an OBDII scanner to retrieve the specific fault code, conducting a visual inspection of the sensor and its connections, and testing the sensor's heater circuit.

4. Is it safe to continue driving my 2016 Chevrolet Silverado with OBDII code P2211 related to the NOx Sensor 1 Heater Feedback Circuit Low Voltage?

- It is generally not recommended to drive the vehicle with this code as it can lead to further damage to the emissions system and potentially affect engine performance.

5. How can I repair OBDII code P2211 in my 2016 Chevrolet Silverado?

- Repairing the issue may involve replacing the NOx sensor, repairing damaged wiring or connectors, or addressing any issues with the NOx sensor heater circuit.

6. Can a DIY enthusiast fix the NOx Sensor 1 Heater Feedback Circuit Low Voltage problem in a 2016 Chevrolet Silverado?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the root cause of the issue may require professional help due to the complexity of the emissions system.

7. What is the function of the NOx sensor in a 2016 Chevrolet Silverado?

- The NOx sensor is responsible for monitoring the level of nitrogen oxide emissions in the vehicle's exhaust system to ensure compliance with emission regulations.

8. Will resetting the Check Engine light resolve the OBDII code P2211 issue in my 2016 Chevrolet Silverado?

- Resetting the Check Engine light without addressing the underlying problem will not fix the issue. It is important to diagnose and repair the root cause of the fault code.

9. How can I prevent OBDII code P2211 from recurring in my 2016 Chevrolet Silverado?

- Regular maintenance, timely repairs of any related issues, and avoiding driving with a malfunctioning NOx sensor can help prevent the reoccurrence of the P2211 fault code.

10. Are there any recalls or technical service bulletins related to OBDII code P2211 in a 2016 Chevrolet Silverado?

- It is recommended to check with a Chevrolet dealership or the manufacturer's website to see if there are any recalls or technical service bulletins related to the NOx Sensor 1 Heater Feedback Circuit Low Voltage issue.