AutoCodes – GMC – P22FE 2014 GMC Sierra

P22FE 2014 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 2014 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 286

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 2014 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 2014 GMC Sierra - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2014 GMC Sierra Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2014 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 2014 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 2014 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 2014 GMC Sierra 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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P22FE in a 2014 GMC Sierra related to the NOx Sensor 2 Performance - Sensing Element?

- Common symptoms may include reduced fuel efficiency, engine hesitation, and illuminated Check Engine light.

2. What are some possible causes of the P22FE code in a 2014 GMC Sierra?

- The code may be triggered by issues such as a faulty NOx sensor, damaged wiring, or a problem with the sensing element.

3. How can I diagnose the NOx Sensor 2 Performance - Sensing Element issue in my 2014 GMC Sierra?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the NOx sensor and its connections, and checking for any related issues.

4. Can I continue driving my 2014 GMC Sierra with the P22FE code related to the NOx Sensor 2 Performance - Sensing Element?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to potential engine and emission system problems.

5. How can I repair the NOx Sensor 2 Performance - Sensing Element issue in my 2014 GMC Sierra?

- Repair options may include replacing the NOx sensor, repairing damaged wiring, or addressing any issues with the sensing element to resolve the code.

6. Will resetting the OBDII code P22FE in my 2014 GMC Sierra make the issue related to the NOx Sensor 2 Performance - Sensing Element go away?

- Resetting the code may temporarily clear the Check Engine light, but it will not fix the underlying problem causing the code to trigger.

7. Are there any maintenance tips to prevent the recurrence of the P22FE code in my 2014 GMC Sierra?

- Regularly inspecting and maintaining the NOx sensor, ensuring proper fuel quality, and following recommended service schedules can help prevent the code from reoccurring.

8. Can a DIY enthusiast fix the NOx Sensor 2 Performance - Sensing Element issue in a 2014 GMC Sierra?

- While some may attempt DIY repairs, it is recommended to have the issue diagnosed and repaired by a qualified mechanic to ensure proper resolution.

9. How much does it typically cost to repair the NOx Sensor 2 Performance - Sensing Element issue in a 2014 GMC Sierra?

- Repair costs can vary depending on the exact cause of the problem, but they may range from a few hundred to over a thousand dollars, including parts and labor.

10. Is the NOx Sensor 2 Performance - Sensing Element problem common in 2014 GMC Sierra vehicles?

- While not extremely common, issues related to the NOx sensor and sensing element can occur in 2014 GMC Sierra vehicles, especially as they age and accumulate mileage.