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03/08/2023 1:42 pm
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Hello, I have a 2014 Ford focus Se with 130,xxx miles on it that shows a P0420 code (below efficiency threshold, bank 1) and shifts horribly at 2,000-3,000 rpm’s. It also has a code that says all data isn’t being transmitted (can’t remember exact code, apologies). The downstream 02 sensor has been replaced, accelerates better but still shifts horrible. Before I try to replace the catalytic converter, do you think it is indeed a catalytic converter issue, or something with the dual clutch transmission instead? (Stopped driving car after 02 was replaced with no luck, thanks for any help!)
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