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P22FE 2015 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 2015 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 616

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 2015 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 2015 Chevrolet Silverado - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2015 Chevrolet Silverado Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2015 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 2015 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 2015 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P22FE 2015 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 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22FE in a 2015 Chevrolet Silverado related to NOx Sensor 2 Performance?

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

2. What are the possible causes of the NOx Sensor 2 Performance - Sensing Element issue (P22FE) in a 2015 Chevrolet Silverado?

- Causes can include a faulty NOx sensor, wiring issues, exhaust system leaks, or problems with the engine's fuel system.

3. How serious is the OBDII code P22FE related to NOx Sensor 2 Performance in a 2015 Chevrolet Silverado?

- This code should not be ignored, as it can lead to increased emissions, potential damage to the catalytic converter, and possible failure to pass emissions tests.

4. Can driving with the P22FE code present harm the 2015 Chevrolet Silverado?

- Continuing to drive with this code can potentially cause further damage to the vehicle's emissions system and reduce overall engine efficiency.

5. How can I diagnose the NOx Sensor 2 Performance issue in my 2015 Chevrolet Silverado?

- Diagnosing this problem typically involves using an OBDII scanner to retrieve the specific fault code and then conducting further testing on the NOx sensor and related components.

6. Is it possible to reset the P22FE code on a 2015 Chevrolet Silverado without fixing the issue?

- While clearing the code may temporarily turn off the Check Engine light, the underlying problem causing the code will persist and likely trigger the light again.

7. What are some repair tips for addressing the NOx Sensor 2 Performance fault code on a 2015 Chevrolet Silverado?

- Repair tips may include checking and repairing any damaged wiring, replacing the NOx sensor, repairing any exhaust leaks, and ensuring proper functioning of the fuel system.

8. Is it recommended to attempt DIY repairs for the P22FE code on a 2015 Chevrolet Silverado?

- DIY repairs are possible for some aspects of this issue, such as checking and replacing the sensor, but complex repairs related to the exhaust system may require professional assistance.

9. How much can I expect to pay for repairing the NOx Sensor 2 Performance problem on a 2015 Chevrolet Silverado?

- Repair costs can vary depending on the specific issue, but replacing a NOx sensor may cost between $200 to $500, while addressing exhaust leaks or other system problems may increase the total repair bill.

10. Can a faulty NOx Sensor 2 Performance - Sensing Element (P22FE) code impact the overall performance of a 2015 Chevrolet Silverado?

- Yes, a malfunctioning NOx sensor can affect the vehicle's performance, fuel efficiency, and emissions output, making it important to address the issue promptly.