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 part that helps clean the air coming out of the engine. It's getting too hot, which can be bad for the car.
The NOx adsorber is a device that captures nitrogen oxides (NOx) from the exhaust gases. This code indicates that the adsorber is experiencing higher than normal temperatures.
The NOx adsorber is part of the emissions control system and is designed to reduce NOx emissions by capturing them in a special material. When the adsorber gets too hot, it can fail to perform its function properly, potentially leading to increased emissions and damage to the adsorber itself.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty NOx adsorber
• Exhaust system blockage
• Faulty temperature sensor
NOx: Nitrogen Oxides, pollutants produced during combustion.
Adsorber: A device that captures and holds substances on its surface.
• Check for any exhaust leaks or blockages.
• Inspect the NOx adsorber for damage.
• Test the temperature sensor for proper operation.
• Replace the NOx adsorber if damaged.
• Clear any blockages in the exhaust system.
• Replace the faulty temperature sensor.
• OBD-II scanner
• Multimeter
• Wrench set
$300 - $1200
Moderate
• Volkswagen Jetta
• Audi A4
• BMW 3 Series
• Regular maintenance of the exhaust system
• Use high-quality fuel
• Avoid excessive idling
Sensor Issue
• Do not ignore the Check Engine Light.
• Seek professional diagnosis if unsure.
• Avoid driving aggressively until the issue is resolved.
Check with your vehicle manufacturer for emissions-related warranty coverage.
This code has become more common with the increased use of NOx adsorbers in diesel engines to meet stringent emissions standards.
Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent emissions violations and potential damage.
Driving with a malfunctioning emissions system may lead to fines and is harmful to the environment.
• Vehicle at operating temperature
• Engine idling
The NOx adsorber is located in the exhaust system, typically near the catalytic converter.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to increased emissions, potential damage to the NOx adsorber, and failing emissions tests.
Q: Can I fix this myself?
A: If you have the necessary tools and experience with vehicle repairs, you may be able to address some causes. However, professional diagnosis is recommended.
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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.