Questions & Answers for: Mazda p0420 code

...P0420 code is a more common one in general. The description for P0420 is Catalyst System Efficiency Below Threshold (Bank 1). You're going to want to focus your diagnosis efforts on the O2 sensors, ...

code when I got it and here it is P0420 can you please tell me if this code has anything t9o do with the catalytic converter? I have noticed that this car seems to be using more gas than it should be.

...code that I sent, P0420 which is Catalyst System Efficiency Below Threshold Bank one but what is the main cause,oxygen sensor? I have noticed that it's using more gas than it should be;please help me ...

...code P0420 is for a bad cat. converter. replacing 02 sensors wont repair this code. the code simply's means that thje cat. converter is not working as designed and will need to be replaced. The PCM ...

check engine light stays on after the car has had two catalytic converter flushes Cat Converter flushes??? I think you got your wallet flushed. , if the code is p0420, you need a new converter.

code p0420. what should i do to fix the code for it to pass ommissions test? Replace the 02 sensor bank 1. Although there was a service bulletin for your year car. Ask your dealer about it. Also might

p0420 code , its came when i got water in spark plugs and my car got some miss fires , after few days that code came . now one day i saw that my car's air hose creaked , so i replaced it right

which o2 sensor to change for codes p0420 in 2005 mazda 3 where the catalyst is missing No cat this must be a middle east model then ,they have no cats or O2 sensors P0420 Catalytic Converter System ...

...code P0420. I connected a scanner to check o2 sensors and front and rear have similar readings. O2 sensors are ok? I need to change catalityc? What another things could check to solve the problem? Hi ...

I have a 98 Mazda 626, error codes p0420 and p0505, anything that could cause both? No problems with the car just need to get the car to pass emmissions so need the check engine light off. It does ...