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L.Cash

2003 Gs300 Cel - Help Please

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I recently purchased a 2003 GS300 w/ 79,000 miles. A few days ago, my CEL came on, and the VSC lights. I took the car by Autozone today and got the code. It's P0420. The description says: Catalyst efficiency below threshold - bank 1.

Does anybody have any idea what this means and what the repair would possibly be?

I appreciate any help.

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Either your cat needs replacing or the post cat 02 sensor is shot.

Welcome to the club cheers.gif

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Either your cat needs replacing or the post cat 02 sensor is shot.

Welcome to the club cheers.gif

Thanks for the welcome, and I appreciate the help! I got a 3yr/36K miles service contract on the car when I bought it, so regardless of what the repair is going to be, I will only be out $100 for the deductible. :)

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Either your cat needs replacing or the post cat 02 sensor is shot.

Welcome to the club cheers.gif

Thanks for the welcome, and I appreciate the help! I got a 3yr/36K miles service contract on the car when I bought it, so regardless of what the repair is going to be, I will only be out $100 for the deductible. :)

Good for you cheers.gif The cat alone is around $925.00, Not to mention labor.

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