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 the car's computer has detected a problem with the power supply to a sensor that measures pollution from the car's exhaust on one side of the engine.
The P220C code indicates an issue with the supply voltage circuit for the NOx sensor located on bank 2, sensor 1. This sensor is responsible for measuring nitrogen oxide levels in the exhaust.
The NOx sensor is part of the vehicle's emissions control system and is used to monitor the level of nitrogen oxides in the exhaust gases. Bank 2 refers to the side of the engine opposite to bank 1, and sensor 1 is typically located before the catalytic converter. A P220C code is triggered when the Engine Control Module (ECM) detects an abnormal voltage level in the NOx sensor supply circuit.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty NOx sensor
• Damaged wiring or connectors
• ECM issues
NOx: Nitrogen Oxides, a group of gases that are major pollutants.
ECM: Engine Control Module, the computer that manages the engine's operation.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the NOx sensor for proper voltage and operation.
• 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
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance checks
• Ensure proper fuel quality
• Timely replacement of sensors
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid prolonged driving to prevent further damage.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common with the increased use of NOx sensors in modern vehicles to meet emissions standards.
Moderate – Should be addressed soon to avoid potential damage to the catalytic converter and increased emissions.
Driving with a malfunctioning emissions system can lead to increased pollution and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in closed-loop mode
The NOx sensor for bank 2, sensor 1 is typically located in the exhaust system before the catalytic converter on the side of the engine opposite to cylinder 1.
Q: What is a NOx sensor?
A: A NOx sensor measures the levels of nitrogen oxides in the vehicle's exhaust gases.
Q: Can I drive with a P220C code?
A: While it may be possible to drive, it is not recommended as it can lead to increased emissions and potential damage to the catalytic converter.
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Universal · Digital multimeter
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal 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.