AutoCodes – Chevrolet – P22FE 2018 Chevrolet Silverado

P22FE 2018 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 2018 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 892

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 2018 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 2018 Chevrolet Silverado - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2018 Chevrolet Silverado Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P22FE 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P22FE 2018 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 P22FE 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22FE in a 2018 Chevrolet Silverado related to NOx Sensor 2 Performance - Sensing Element?

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

2. What are the potential causes of OBDII code P22FE in a 2018 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor 2, wiring issues, exhaust system leaks, or a malfunctioning sensing element within the sensor.

3. How serious is OBDII code P22FE in a 2018 Chevrolet Silverado?

- While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the emissions system and ensure optimal engine performance.

4. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P22FE present?

- It is recommended to avoid prolonged driving with this code active to prevent potential long-term damage to the vehicle's emissions system and to maintain optimal engine performance.

5. How can I diagnose and repair OBDII code P22FE in my 2018 Chevrolet Silverado?

- Diagnosis typically involves using a scan tool to pinpoint the issue with the NOx sensor 2 and its sensing element. Repair may involve replacing the sensor, addressing wiring problems, or fixing exhaust leaks.

6. Is it possible to reset OBDII code P22FE in a 2018 Chevrolet Silverado without addressing the underlying issue?

- While clearing the code may temporarily turn off the Check Engine Light, it is crucial to address the root cause to prevent the code from reoccurring and potentially causing more severe problems.

7. How much does it cost to fix OBDII code P22FE in a 2018 Chevrolet Silverado?

- The cost of repairs can vary depending on the specific issue causing the code. Costs may range from a couple of hundred dollars for sensor replacement to more significant expenses for complex repairs.

8. Are there any maintenance tips to prevent OBDII code P22FE from appearing in a 2018 Chevrolet Silverado?

- Regular maintenance of the emissions system, including checking the NOx sensors and ensuring proper exhaust system function, can help prevent issues leading to the P22FE code.

9. Can a DIY enthusiast address OBDII code P22FE in a 2018 Chevrolet Silverado, or should it be handled by a professional mechanic?

- While some DIYers may have the skills to replace a NOx sensor or address wiring problems, it is recommended to seek professional help for accurate diagnosis and effective repair of this code.

10. How long does it typically take to repair OBDII code P22FE in a 2018 Chevrolet Silverado?

- The repair time can vary based on the specific issue causing the code and the complexity of the repair. Simple sensor replacements may take a few hours, while more involved repairs could take longer.