P0420+P0430 fault codes help - Toyota RAV4 Forums
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#1 (permalink) Old 06-29-2011, 12:41 PM
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P0420+P0430 fault codes help

Hello Toyota techys,
sorry to bring this up again but I don't seem to have found anyone who has successfully found and repaired this fault, but I wondered if you can help.
I have oxygen sensor problems on the rav4 1AZ-FE,
error codes im getting are.
P0430 Catalyst System Efficiency Below Threshold (Bank 2)
P0420 17 Catalyst System Efficiency Below Threshold (Bank 1)
cylinder 1 misfire, cylinder 4 misfire.
all same errors every time I reset them and try again.
im thinking either the top two 02 sensors could be causing all these problems?
i have ordered these and they will be in tomorrow costing me £82ea+vat from euro car parts.
I have seen various other remedy's not explaining themselves very well, like cat gone,well can I test this? if sensors are dead any way of testing these and also read that they can be cleaned any ideas if this works?
any ideas welcome...
please help. I can see this costing a fortune to repair.


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#2 (permalink) Old 07-02-2011, 02:10 PM
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peeps does anyone have the software, drivers mainly cause i think there not working for the 'obd2 vag tacho usb 2.2' it worked for a while a year ago when i brought it but does not work no longer tried to reinstall it and cannot get it going.
As this reads fault codes and need it to reset the engine management light when i discover the faults with my rav.
\thanks in advance.

get your mind set and confidence will lead you on.
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#3 (permalink) Old 07-04-2011, 09:37 AM
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I am afraid I can't help with any of your problems as my knowledge base is very limited.

However, what I do know is that you may find more help if you post your question in the 4.2 section. Rav4s with 1AZ-FE engines belong there (2001 - 2005 models).

1999, Quicksilver FX, 5dr, 5spd, 4WD
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#4 (permalink) Old 07-04-2011, 10:04 AM
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My only similar experience was with my 2001 Subaru Forester. Kept setting an O2 sensor code. Typically that would mean a bad sensor but on eBay I found a listing for a catalytic converter saying it would fix the specific code I was getting. I bought it and it solved the problem w/o changing the sensor.

Fred
2006 RAV4 V6 4WD Red Limited - wife's
2006 Accord V6 Hybrid - Dr. Dyno's - quick as the RAV but +8 mpg
2003 Odyssey V6 - handy people & cargo mover
1999 F-250 4X4 Diesel - snow plow, Bully Dog chip
2001 F-250 4X4 Diesel - truck camper, TS chip, 20' bike/trike dyno trailer
2004 Suzuki DRZ-400S Dual Sport

It's the pedal (or the handgrip) on the right!!
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