Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor in the car that checks for pollution is not working right. It's like a nose that can't smell properly.
The P22FE code indicates an issue with the performance of the NOx sensor located in Bank 1, Sensor 2. This sensor is responsible for measuring nitrogen oxides in the exhaust to ensure the vehicle is running cleanly.
The NOx sensor monitors the levels of nitrogen oxides in the exhaust gases. Bank 1 Sensor 2 refers to the second sensor on the first bank of the engine. A performance issue suggests that the sensor is not providing accurate readings, which could affect the vehicle's emission control system.
• Check Engine Light (CEL) is on
• Decreased fuel efficiency
• Increased emissions
• Faulty NOx sensor
• Wiring issues or poor electrical connections
• Exhaust leaks near the sensor
NOx: Nitrogen Oxides, a group of gases that are harmful pollutants.
Bank 1: The side of the engine with cylinder 1, typically the driver's side in a V-type engine.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the NOx sensor.
• Perform a visual inspection for exhaust leaks.
• Replace the faulty NOx sensor.
• Repair or replace damaged wiring.
• Fix any exhaust leaks.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $500
Moderate
• Volkswagen Jetta
• Audi A3
• BMW 3 Series
• Regularly inspect and maintain the exhaust system.
• Ensure timely replacement of sensors as per the manufacturer's recommendation.
• Use quality fuel to prevent sensor contamination.
Sensor Issue
• Address the issue promptly to avoid increased emissions.
• Consult a professional mechanic if unsure about the repair process.
Check if the vehicle's emission system is covered under warranty.
This code has become more common with the increased use of NOx sensors in modern vehicles to meet emission standards.
Moderate – It should be addressed soon to maintain vehicle performance and emissions compliance.
Ignoring this code could lead to failing emissions tests and increased pollution.
• Engine at operating temperature
• Vehicle driven under normal conditions
The NOx sensor is typically located in the exhaust system, downstream of the catalytic converter on Bank 1.
Q: What does a NOx sensor do?
A: A NOx sensor measures the levels of nitrogen oxides in the exhaust gases to help control emissions.
Q: Can I drive with a P22FE code?
A: While the car may still run, it's best to fix the issue soon to avoid increased emissions and potential damage.
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Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.