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P22FE 2015 GMC Sierra Code - NOx Sensor 2 Performance - Sensing Element

Quick Answer

The P22FE diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the NOx Sensor 2 Performance - Sensing Element. Common causes include Sensor Malfunction: The NOx sensor's sensing element may be faulty or damaged, leading to inaccurate readings, Wiring Issues: Problems with the wiring connecting the sensor to the ECM can cause communication errors and trigger the code, Exhaust System Leaks: Leaks in the exhaust system can affect the NOx sensor's readings and performance. 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 GMC Sierra indicates NOx Sensor 2 Performance - Sensing Element.
Common causes
Common causes include Sensor Malfunction: The NOx sensor's sensing element may be faulty or damaged, leading to inaccurate readings, Wiring Issues: Problems with the wiring connecting the sensor to the ECM can cause communication errors and trigger the code, Exhaust System Leaks: Leaks in the exhaust system can affect the NOx sensor's readings and performance.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 19, 2024
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Code P22FE 2015 GMC Sierra Description

The P22FE diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the NOx Sensor 2 Performance - Sensing Element. NOx sensors are crucial components in modern vehicles equipped with diesel engines, as they help monitor and control the levels of nitrogen oxide (NOx) emissions. NOx sensors work by detecting the amount of NOx in the exhaust gases and sending this information to the engine control module (ECM) for proper adjustment of the air-fuel mixture to reduce emissions.

OBDII Code P22FE 2015 GMC Sierra - NOx Sensor 2 Performance - Sensing Element
P22FE 2015 GMC Sierra Code - NOx Sensor 2 Performance - Sensing Element

Common Causes of P22FE 2015 GMC Sierra

  1. Sensor Malfunction: The NOx sensor's sensing element may be faulty or damaged, leading to inaccurate readings.
  2. Wiring Issues: Problems with the wiring connecting the sensor to the ECM can cause communication errors and trigger the code.
  3. Exhaust System Leaks: Leaks in the exhaust system can affect the NOx sensor's readings and performance.
  4. ECM Communication Problems: Issues with the ECM receiving and interpreting data from the NOx sensor can also trigger this code.

Symptoms of P22FE 2015 GMC Sierra

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning NOx sensor can lead to improper fuel mixture adjustments, resulting in decreased fuel efficiency.
  3. Poor Performance: The vehicle may experience a decrease in performance, such as reduced acceleration or overall power.
  4. Failed Emissions Test: If the NOx sensor is not functioning correctly, the vehicle may fail an emissions test due to increased NOx emissions.

How to Fix P22FE 2015 GMC Sierra

  1. Diagnostic Scan: Begin by using a diagnostic scan tool to retrieve the specific trouble code and identify the issue with the NOx Sensor 2 Performance - Sensing Element.
  2. Inspect Sensor: Check the NOx sensor for any physical damage or signs of wear. Replace the sensor if necessary.
  3. Check Wiring: Inspect the wiring harness connecting the sensor to the ECM for any damage or loose connections. Repair or replace as needed.
  4. Clear Codes: After addressing the underlying issue, clear the DTC and reset the check engine light using the diagnostic scan tool.
  5. Test Drive: Take the vehicle for a test drive to ensure that the repair has resolved the problem and that the check engine light does not reappear.

Cost to Fix P22FE 2015 GMC Sierra

The typical repair costs for addressing a NOx Sensor 2 Performance - Sensing Element issue can vary depending on the specific cause of the problem and the labor rates at the repair shop. In general, replacing a NOx sensor can cost between $200 and $500, including parts and labor. However, if the issue is related to wiring problems or other underlying issues, the cost may be higher. It's recommended to check with local auto repair shops for a more accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas.

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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 GMC Sierra Code

1. What does the OBDII code P22FE mean for a 2015 GMC Sierra?

The code P22FE indicates a performance issue with NOx Sensor 2, specifically related to the sensing element's accuracy in measuring nitrogen oxide levels.

2. What are the common symptoms of code P22FE in a 2015 GMC Sierra?

Symptoms can include the check engine light turning on, reduced fuel efficiency, increased emissions, and possible engine derate mode.

3. What causes the P22FE code to trigger on a 2015 GMC Sierra?

Common causes include a faulty NOx Sensor 2, wiring or connector issues, soot or contamination buildup on the sensor, or software-related problems.

4. Can I continue driving with the P22FE code on my 2015 GMC Sierra?

While the vehicle may remain drivable, ignoring the issue can lead to increased emissions, reduced performance, and potential damage to other emissions-related components.

5. How do you diagnose the P22FE code on a 2015 GMC Sierra?

Diagnosis involves scanning for trouble codes, inspecting the NOx sensor wiring and connectors, checking for exhaust leaks, and testing the sensor's performance with a diagnostic tool.

6. How do you fix the P22FE code on a 2015 GMC Sierra?

Repairs may include replacing the NOx Sensor 2, cleaning the sensor if contaminated, repairing damaged wiring, or updating the engine control module (ECM) software.

7. How much does it cost to fix code P22FE on a 2015 GMC Sierra?

Replacing a NOx sensor can cost between $300 and $700, depending on parts and labor. Additional repairs for wiring or exhaust issues may increase the cost.

8. Can a dirty NOx sensor cause the P22FE code?

Yes, soot or contamination on the NOx sensor can reduce its accuracy and trigger the P22FE code.

9. Is the P22FE code covered under warranty on a 2015 GMC Sierra?

This depends on your warranty coverage. Emissions components like the NOx sensor may be covered under the federal emissions warranty for up to 8 years or 80,000 miles.

10. What happens if the P22FE code is not repaired?

If left unrepaired, the vehicle may experience reduced performance, higher emissions, and potential failure of other emissions control components over time.

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