AutoCodes – Chevrolet – P22FE 2016 Chevrolet Silverado

P22FE 2016 Chevrolet Silverado Code - NOx Sensor 2 Performance - Sensing Element

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 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides Sensor 2 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: P22FE 2016 Chevrolet Silverado indicates NOx Sensor 2 Performance - Sensing Element.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides Sensor 2 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 483

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 P22FE 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 P22FE 2016 Chevrolet Silverado - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2016 Chevrolet Silverado Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2016 Chevrolet Silverado?

Faulty Nitrogen Oxides (NOx) Sensor 2
Nitrogen Oxides Sensor 2 harness is open or shorted
Nitrogen Oxides Sensor 2 circuit poor electrical connection

How to Fix the DTC P22FE 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 P22FE 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 P22FE 2016 Chevrolet Silverado code?

Need more information on how to fix the P22FE 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the 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 P22FE 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22FE in a 2016 Chevrolet Silverado?

- Common symptoms include decreased fuel efficiency, engine misfires, and the illumination of the check engine light.

2. What does the OBDII code P22FE indicate in a 2016 Chevrolet Silverado?

- The code P22FE indicates a problem with the NOx Sensor 2 performance, specifically related to the sensing element.

3. What are the possible causes of OBDII code P22FE in a 2016 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, wiring issues, exhaust system leaks, or issues with the engine control module.

4. How can I diagnose the OBDII code P22FE in my 2016 Chevrolet Silverado?

- Diagnosis typically involves using a scan tool to read the code, checking the wiring and connections to the NOx sensor, and testing the sensor's functionality.

5. Can I drive my 2016 Chevrolet Silverado with the OBDII code P22FE?

- It's not recommended to drive the vehicle with this code as it can lead to increased emissions, decreased performance, and potential damage to the engine components.

6. How do I repair OBDII code P22FE in my 2016 Chevrolet Silverado?

- Repair may involve replacing the NOx sensor, repairing any wiring issues, fixing exhaust leaks, or reprogramming the engine control module.

7. Is it possible to reset the OBDII code P22FE in a 2016 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the code with a scan tool, it's crucial to address the root cause to prevent the issue from recurring.

8. Can a DIY enthusiast fix the OBDII code P22FE in a 2016 Chevrolet Silverado?

- Depending on the exact cause, some DIY repairs like sensor replacement or checking for loose connections may be feasible, but complex issues may require professional assistance.

9. How important is it to address the OBDII code P22FE promptly in a 2016 Chevrolet Silverado?

- It is essential to address this code promptly to ensure optimal engine performance, fuel efficiency, and compliance with emissions regulations.

10. How can I prevent the OBDII code P22FE from occurring in my 2016 Chevrolet Silverado in the future?

- Regular maintenance, timely repairs of any related issues, and using high-quality fuel can help prevent the recurrence of the NOx sensor performance problem.