Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car that helps reduce pollution. It's like a heater that isn't working, and it helps a sensor check the car's exhaust for bad gases.
The P2205 code indicates an issue with the heater circuit of the NOx sensor on bank 1, sensor 1, which is responsible for heating the sensor to its optimal operating temperature.
The NOx sensor is used to measure the levels of nitrogen oxides in the exhaust gases. It requires a heater to reach the correct operating temperature quickly. When the powertrain control module (PCM) detects an open or faulty circuit in the heater of the NOx sensor, it triggers the P2205 code.
• Check Engine Light is on
• Increased emissions
• Possible reduction in fuel efficiency
• Engine may run rough
• Faulty NOx sensor heater
• Open or shorted wiring in the heater circuit
• Blown fuse for the heater circuit
• Faulty PCM
NOx: Nitrogen Oxides, pollutants produced during combustion
PCM: Powertrain Control Module, the vehicle's engine control unit
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors to the NOx sensor
• Check the fuse for the NOx sensor heater circuit
• Test the NOx sensor heater resistance
• Replace the NOx sensor if faulty
• Repair or replace damaged wiring or connectors
• Replace blown fuses
• Reprogram or replace the PCM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Volkswagen Passat
• Audi A4
• BMW 3 Series
• Regular maintenance and inspections
• Ensure proper fuel quality
• Avoid short trips that don't allow the engine to reach operating temperature
Sensor Issue
• Have the vehicle inspected by a professional
• Avoid ignoring the Check Engine Light
• Monitor fuel efficiency for any changes
Check with the 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 – While the vehicle may still be drivable, it's important to address emissions-related issues promptly.
Ignoring emissions-related codes can lead to failed emissions tests and may be illegal in some regions.
• Engine at operating temperature
• Vehicle running at idle
The NOx sensor is typically located in the exhaust system, upstream of the catalytic converter on bank 1.
Q: Can I drive with a P2205 code?
A: You can drive with this code, but it's best to fix it soon to avoid increased emissions and potential engine performance issues.
Q: What happens if I ignore the P2205 code?
A: Ignoring this code can lead to higher emissions, potential engine performance problems, and failed emissions tests.
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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.