2001 Toyota Camry "code p0420 back replaced cat" Questions

...P0420 and P0430. 1) The car has two O2 sensors and two AF sensors....I replaced two O2 sensors to no avail... Is there another O2 sensor located downstream from the 3rd catalytic converter that's ...

...code P0420 SES came on today. Autozone says code is P0420. Does this ALWAYS mean the catalytic convertor much be replaced? 137K miles. No O2 sesnors have ever been replaced. code p0420 refers to the ...

code reading p0420 on '99 chevy s10 blazer, low catalyst threshold. Is this a bad catalytic converter or burned valves? there are a couple of things to consider here. That code indicates that the O2 ...

...code p0420.Can ussually have cat replaced at aftermarket muffler shop for approx. $200 cheaper than valve job or excessive fuel that you have used and damage that may occur to your engine. my 98 gmc ...

code p0420 i have a 2000 honda civic dx and this code came up p0420 they say it's the catalyst converter but i just changed that part on may last year. symptoms when i drive is make noise gas runs out

P0420: Catalyst System Low Efficiency Bank 1 DTC P0430: Catalyst System Low Efficiency Bank 2 bank 1 means , that bank that contains cylinder #1 where is cylinder #1 it on all V engines, that cylinder

code p0420 on my 2005 altima 2.5 s i have an 2005 Nissan Altima that is giving me an check engine error and i have taken it to a auto zone and gave me an engine code of P0420, can someone tell me what

code of P0420. AND do I need to replace both sensors upstream and down. Or just the one that is showing up on the obd scanner. Bank one is front side of cat. It should also tell u if it's cat 1 or cat

...code po420 po132 and replaced co sensor the check engine light came back on p0420 is cat below efficency have you checked the cat to see if your emissions are in spec ? if they are it could be the ...

p0420 code so I replaced the spark plugs and the downstream O2 sensor and light came back on and gave the same code ..... suggestions??? p0420 no FSM> and not looking up P0420? no engine stated, so