Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a special sensor that helps reduce pollution. This sensor needs to stay warm to work properly, and right now, the part that keeps it warm isn't working on one side of the engine.
The NOx sensor heater is not functioning properly, which can affect the sensor's ability to measure nitrogen oxides accurately.
The P2218 code indicates that the NOx sensor heater circuit on Bank 2 is open or has a malfunction. The heater is essential for the sensor to reach its operating temperature quickly, ensuring accurate readings of nitrogen oxide emissions. An open circuit can result from wiring issues, a faulty sensor, or a malfunctioning control module.
• Check Engine Light is on
• Increased emissions
• Poor fuel economy
• Failed emissions test
• Faulty NOx sensor heater
• Damaged wiring or connectors
• Blown fuse
• Faulty Engine Control Module (ECM)
NOx: Nitrogen Oxides, pollutants produced during combustion.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage.
• Check the fuse related to the NOx sensor heater.
• Test the NOx sensor heater resistance.
• Replace the NOx sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the blown fuse.
• 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 sensor wiring.
• Ensure timely servicing of emission control systems.
• Use high-quality fuel to reduce sensor contamination.
Sensor Issue
• Get the issue diagnosed by a professional mechanic.
• Avoid prolonged driving with the Check Engine Light on.
• Keep up with regular vehicle maintenance.
Check with your vehicle manufacturer for emissions-related warranty coverage.
The P2218 code has become more common with the increase in stringent emissions regulations, requiring accurate NOx readings.
Moderate – While the vehicle may still drive, emissions and fuel economy may be affected.
Driving with a malfunctioning emissions control system can lead to increased pollution and may not comply with local emissions laws.
• Engine running at operating temperature
• Vehicle in closed-loop mode
The NOx sensor is typically located in the exhaust system, downstream of the catalytic converter on Bank 2.
Q: Can I drive my car with a P2218 code?
A: You can drive the car, but it's best to fix the issue soon to avoid increased emissions and potential damage.
Q: How does a NOx sensor heater work?
A: The heater warms the sensor to its optimal operating temperature quickly, ensuring accurate NOx readings.
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Fitment Required · Vehicle-fitment part
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