Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that a sensor that checks for pollution is not working right. It's like a nose that can't smell properly.
The P2202 code indicates that the NOx (Nitrogen Oxide) sensor on Bank 1, Sensor 1 is reporting a low voltage signal to the engine control module (ECM). This sensor helps monitor emissions.
The NOx sensor measures the amount of nitrogen oxides in the exhaust gases. A low circuit signal means the sensor is not sending enough voltage back to the ECM, which could indicate a faulty sensor, wiring issue, or other related problem.
• Check Engine Light on
• Poor fuel economy
• Failed emissions test
• Faulty NOx sensor
• Wiring issues or poor connections
• ECM issues
NOx: Nitrogen Oxides, pollutants produced during combustion.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the NOx sensor and its wiring for damage.
• Test the sensor's voltage and resistance.
• Replace the faulty NOx sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $600
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regularly inspect and maintain the exhaust system.
• Use quality fuel to reduce emissions.
• Perform regular vehicle maintenance checks.
Sensor Issue
• Have the vehicle inspected by a professional.
• Avoid driving long distances until repaired.
• Monitor fuel consumption for changes.
Check with the vehicle manufacturer for emissions-related warranty coverage.
This code has been more common in vehicles with higher mileage or those that frequently drive in urban areas with stop-and-go traffic.
Moderate – It's important to address this issue to maintain vehicle performance and pass emissions tests.
Driving with a malfunctioning NOx sensor may lead to increased emissions and could result in fines if emissions standards are not met.
• Engine at operating temperature
• Vehicle running at idle
The NOx sensor is typically located in the exhaust system before the catalytic converter on Bank 1.
Q: What does Bank 1 mean?
A: Bank 1 refers to the side of the engine where cylinder number 1 is located.
Q: Can I drive with a P2202 code?
A: It's possible to drive short distances, but it's recommended to fix the issue soon to avoid increased emissions and potential engine damage.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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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.