AutoCodes – GMC – P22FE 2016 GMC Sierra

P22FE 2016 GMC Sierra 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 GMC Sierra 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 281

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 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 P22FE 2016 GMC Sierra - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2016 GMC Sierra Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2016 GMC Sierra?

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 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 P22FE 2016 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 P22FE 2016 GMC Sierra code?

Need more information on how to fix the P22FE 2016 GMC Sierra 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 GMC Sierra Code

1. What are the common symptoms of OBDII code P22FE in a 2016 GMC Sierra?

The common symptoms of P22FE include reduced engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P22FE indicate in a 2016 GMC Sierra?

P22FE indicates an issue 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 GMC Sierra?

Possible causes of P22FE include a faulty NOx sensor, wiring or connection issues, exhaust system leaks, or a malfunctioning sensing element.

4. How can I diagnose the OBDII code P22FE in my 2016 GMC Sierra?

Diagnosing P22FE typically involves using an OBDII scanner to retrieve the code, inspecting the NOx sensor and its connections, checking for exhaust leaks, and testing the sensing element's functionality.

5. Can I continue driving my 2016 GMC Sierra with the P22FE code?

It is not recommended to drive your vehicle with an active P22FE code, as it can lead to reduced performance and potential damage to the emissions system. It is best to address the issue promptly.

6. How can I repair the NOx Sensor 2 performance issue causing the P22FE code in my 2016 GMC Sierra?

Repairing the P22FE code may involve replacing the NOx sensor, repairing any wiring or connection issues, fixing exhaust leaks, or replacing the sensing element as needed.

7. Is it possible to reset the OBDII code P22FE in a 2016 GMC Sierra?

Resetting the code may temporarily turn off the check engine light, but it is crucial to diagnose and address the underlying issue causing the P22FE code to prevent it from reoccurring.

8. How much does it cost to repair the NOx Sensor 2 performance issue causing the P22FE code in a 2016 GMC Sierra?

The cost of repairing P22FE can vary depending on the specific cause of the issue, the parts needed, and labor costs. It is advisable to consult with a mechanic for an accurate estimate.

9. Can a DIY enthusiast fix the NOx Sensor 2 performance problem triggering the P22FE code in a 2016 GMC Sierra?

While some DIY enthusiasts may have the skills to address the P22FE code, it is recommended to consult with a professional mechanic, especially when dealing with emissions-related issues for proper diagnosis and repair.

10. How often does the NOx Sensor 2 performance issue causing the P22FE code occur in 2016 GMC Sierra vehicles?

The occurrence of the NOx Sensor 2 performance issue leading to the P22FE code can vary among 2016 GMC Sierra vehicles and may be influenced by factors such as driving conditions, maintenance history, and overall vehicle health.