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P22FE 2014 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 2014 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 255

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 2014 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 2014 Chevrolet Silverado - NOx Sensor 2 Performance - Sensing Element - AutoCodes.com — P22FE 2014 Chevrolet Silverado Code - NOx Sensor 2 Performance - Sensing Element

What does this mean?

What are the Possible Causes of the DTC P22FE 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P22FE 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 Chevrolet Silverado Code

1. What does the OBDII code P22FE mean for a 2014 Chevrolet Silverado?

P22FE indicates a performance issue with NOx Sensor 2, specifically related to the sensing element, which monitors nitrogen oxide levels in the exhaust system.

2. What are the common symptoms of a P22FE code?

Common symptoms include a check engine light, reduced fuel efficiency, poor engine performance, and potential activation of the truckâ€™s limp mode.

3. What causes the P22FE code to appear?

Causes can include a faulty NOx Sensor 2, wiring issues (e.g., damaged or corroded connections), exhaust leaks, or software-related problems in the engine control module (ECM).

4. Can I drive my Silverado with a P22FE code?

While it may be possible to drive, ignoring the code could lead to increased emissions, reduced performance, and potential damage to other components, such as the catalytic converter.

5. How do I diagnose a P22FE code on my 2014 Chevrolet Silverado?

Start by scanning the vehicle with an OBDII tool, inspecting NOx Sensor 2 and its wiring for damage, and checking for exhaust leaks or ECM updates.

6. How is a P22FE code fixed?

Repairs typically involve replacing the faulty NOx Sensor 2, repairing wiring or connector issues, fixing exhaust leaks, or reprogramming the ECM if necessary.

7. How much does it cost to repair a P22FE code?

Replacing a NOx sensor can cost between $200 and $600, including parts and labor, but costs may vary depending on the extent of the issue.

8. Can a dirty air filter cause a P22FE code?

While unlikely, a dirty air filter can affect overall engine performance, which might indirectly contribute to issues with the emissions system.

9. Does a P22FE code mean my catalytic converter is bad?

Not necessarily. While a bad catalytic converter can affect emissions, this code specifically relates to the performance of NOx Sensor 2.

10. Do I need a software update to fix a P22FE code?

In some cases, a software update for the ECM may resolve the issue, especially if itâ€™s a known problem for your vehicle model. Check with your dealer or mechanic.