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 that a part in the exhaust system, called the catalyst, isn't working well enough to clean the car's exhaust on one side of the engine.
The P2424 code is triggered when the Engine Control Module (ECM) detects that the hydrocarbon (HC) adsorption catalyst in the exhaust system is not performing efficiently on Bank 2, which is one side of the engine.
The HC adsorption catalyst is designed to reduce hydrocarbon emissions by absorbing them when the engine is cold and releasing them when the catalyst is hot enough to convert them into less harmful substances. Bank 2 refers to the side of the engine opposite Bank 1. If the ECM detects that the catalyst's efficiency is below a certain threshold, it triggers the P2424 code.
• Check Engine Light is on
• Increased emissions
• Possible decrease in fuel efficiency
• Faulty HC adsorption catalyst
• Exhaust leaks
• Faulty oxygen sensors
HC: Hydrocarbons, a type of emission from the engine
Catalyst: A component in the exhaust system that helps reduce emissions
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust system for leaks.
• Test the oxygen sensors for proper operation.
• Replace the HC adsorption catalyst if faulty.
• Repair any exhaust leaks.
• Replace faulty oxygen sensors.
• OBD-II scanner
• Wrench set
• Multimeter
$500 - $1500
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance of the exhaust system
• Use quality fuel
• Regularly inspect and replace oxygen sensors
Emissions Control
• Take the vehicle to a professional mechanic for diagnosis.
• Avoid driving the vehicle excessively until the issue is resolved.
Check with your vehicle manufacturer as emissions components may be covered under warranty.
This code has become more common as emissions standards have become stricter, requiring more efficient catalytic converters.
Moderate – While the vehicle can still be driven, it may not pass emissions tests and could lead to further damage if not addressed.
Driving with a malfunctioning emissions system may be illegal in some areas due to environmental regulations.
• Engine at operating temperature
• Vehicle driven under normal conditions
The HC adsorption catalyst is located in the exhaust system, typically near the engine on Bank 2.
Q: Can I drive with a P2424 code?
A: Yes, but it is not recommended as it may lead to increased emissions and potential damage.
Q: How do I know if my HC adsorption catalyst is faulty?
A: A professional mechanic can perform tests to determine if the catalyst is not functioning properly.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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Fitment Required · Vehicle-fitment part
Relevant when the code or supporting diagnostics point toward upstream or downstream oxygen-sensor faults.
This code family often involves upstream or downstream oxygen-sensor diagnosis.
Verify exact sensor position and vehicle fitment before buying.
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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.