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Can you tell me the diagnostic trouble code P0420 for a 2003 Honda CR-V?
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When you see Code P0420, it means that the catalytic converter is not working efficiently, leading to increased emissions. If your vehicle is experiencing catalytic converter problems, it can cause various issues. One clear sign is seeing black smoke coming from the engine area, which is not a fire but requires you to shut off the car right away. You may also notice sluggish acceleration, lower maximum speed, and a sulfur or rotten egg smell underneath the vehicle. Repairing a catalytic converter can cost between $950 and $2500, which is not cheap, but necessary to address the problem.
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Frequently, a faulty oxygen sensor in a 2003 Honda CR-V is likely to trigger the P0420 trouble code. Specifically, the upstream oxygen sensor, located before the converter, is usually responsible for setting off this code.
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