AutoCodes – Chevrolet – P22F9 2014 Chevrolet Silverado

P22F9 2014 Chevrolet Silverado Code - NOx Sensor 1 Performance Slow Response Low To High

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, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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: P22F9 2014 Chevrolet Silverado indicates NOx Sensor 1 Performance Slow Response Low To High.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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 234

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 P22F9 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 P22F9 2014 Chevrolet Silverado - NOx Sensor 1 Performance Slow Response Low To High - AutoCodes.com — P22F9 2014 Chevrolet Silverado Code - NOx Sensor 1 Performance Slow Response Low To High

What does this mean?

What are the Possible Causes of the DTC P22F9 2014 Chevrolet Silverado?

Faulty Nitrogen Oxides (NOx) Sensor
Nitrogen Oxides Sensor harness is open or shorted
Nitrogen Oxides Sensor circuit poor electrical connection

How to Fix the DTC P22F9 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 P22F9 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 P22F9 2014 Chevrolet Silverado code?

Need more information on how to fix the P22F9 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P22F9 2014 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 P22F9 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P22F9 in a 2014 Chevrolet Silverado?

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

2. What could be causing the OBDII code P22F9 (NOx Sensor 1 Performance Slow Response Low To High) in a 2014 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, issues with the exhaust system, wiring problems, or a malfunctioning engine control module (ECM).

3. How serious is the OBDII code P22F9 in a 2014 Chevrolet Silverado?

- While the vehicle may still be operational, it is essential to address this issue promptly to prevent potential damage to the engine or catalytic converter.

4. Can I continue driving my 2014 Chevrolet Silverado with the OBDII code P22F9 active?

- It is generally not recommended to continue driving the vehicle with an active P22F9 code, as it can lead to further problems and potential damage to the vehicle's emissions system.

5. What are some possible repair tips for resolving the OBDII code P22F9 in a 2014 Chevrolet Silverado?

- Repair tips may include checking and replacing the NOx sensor, inspecting the exhaust system for leaks or damage, ensuring proper wiring connections, and resetting the ECM.

6. How can I diagnose the OBDII code P22F9 in my 2014 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the NOx sensor and related components, and testing the wiring for continuity and integrity.

7. Is it possible to reset the OBDII code P22F9 in a 2014 Chevrolet Silverado without repairs?

- While you can clear the code temporarily, the underlying issue causing the code will likely trigger it to reappear until the root problem is addressed through proper repairs.

8. Can a DIY enthusiast fix the OBDII code P22F9 in a 2014 Chevrolet Silverado?

- Depending on your mechanical skills and knowledge, simple repairs like sensor replacement or checking wiring connections may be manageable, but complex issues may require professional assistance.

9. How much can I expect to pay to repair the OBDII code P22F9 in my 2014 Chevrolet Silverado?

- Repair costs can vary based on the specific issue causing the code, but expenses may include parts such as the NOx sensor and labor for diagnostics and repairs.

10. Are there any recalls or technical service bulletins related to the OBDII code P22F9 in a 2014 Chevrolet Silverado?

- It's advisable to check with a Chevrolet dealership or online resources for any relevant recalls or technical service bulletins related to the P22F9 code to see if your vehicle is affected.