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2003 Lexus GS300. Why all the mechanics advise that I must change the catalytic converter when they only check engine light code?

Vehicle: 2003 Lexus GS300

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Because it's a very common problem. Instead of taking the time to test the vehicle, which will cost you money, most mechanics relied on their experience to diagnose the problem.

P0430 LEXUS - Catalyst System Efficiency Below Threshold Bank 2
Read more: https://www.autocodes.com/p0430_lexus.html

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