Code Confusion
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Code Confusion
I know I already asked last week about a HFC and such, but I have some new questions 
. I am throwing code P0422 for "Main catalyst:Bank 1: efficiency below threshold". Now everything I have read tends to say that this is caused by a dying cat, hence me asking about a HFC, but on the Rosstech wiki page, they list the possible causes as oxygen sensor/oxygen sensor controls. They say nothing about the cat. They say that code P0420 is for a bad cat. So my question is, how do I know that a HFC with angle block will fix my problems and it's not just the rear 02? I just don't want to replace the cat to find out I need a new sensor. Ohh and the car is a 00 1.8t with only 60K on it.
Thanks,
Bill
. I am throwing code P0422 for "Main catalyst:Bank 1: efficiency below threshold". Now everything I have read tends to say that this is caused by a dying cat, hence me asking about a HFC, but on the Rosstech wiki page, they list the possible causes as oxygen sensor/oxygen sensor controls. They say nothing about the cat. They say that code P0420 is for a bad cat. So my question is, how do I know that a HFC with angle block will fix my problems and it's not just the rear 02? I just don't want to replace the cat to find out I need a new sensor. Ohh and the car is a 00 1.8t with only 60K on it.Thanks,
Bill
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