Hey all,
I know the topic of code P0420 and catalytic convertor replacement has been covered a lot here, but i wasn't able to find the exact answer i'm looking for, hoping someone can help. It's been a rough month for the my 2001 Sienna ! I've had the van only a few months, and it's got 150,000
After just having replaced all my windows and (brand new) tires, which were destroyed in an act of vandalism, my check engine light came on again. I had gotten a code P0420 in the past, but the car was running fine, so i foolishly ignored it for a few months. Now my gas milage is down to around 17 MPG though and i've been quoted between 1100 and $2500 to replace the catalytic convertors. The stealership told me i have a special California model that has extra Cats in it. Need less to say, i'd like to try replacing the O2 sensors and cleaning the Catalytic convertor first, to see if that solves the problem .
My question is this, should i replace all the 02 sensors, or just Bank 1 AND the 2 Air/Fuel ratio sensors? Is Bank 1 O2 sensor the "upstream front? Any other advice would be much appreciated thanks
I know the topic of code P0420 and catalytic convertor replacement has been covered a lot here, but i wasn't able to find the exact answer i'm looking for, hoping someone can help. It's been a rough month for the my 2001 Sienna ! I've had the van only a few months, and it's got 150,000
After just having replaced all my windows and (brand new) tires, which were destroyed in an act of vandalism, my check engine light came on again. I had gotten a code P0420 in the past, but the car was running fine, so i foolishly ignored it for a few months. Now my gas milage is down to around 17 MPG though and i've been quoted between 1100 and $2500 to replace the catalytic convertors. The stealership told me i have a special California model that has extra Cats in it. Need less to say, i'd like to try replacing the O2 sensors and cleaning the Catalytic convertor first, to see if that solves the problem .
My question is this, should i replace all the 02 sensors, or just Bank 1 AND the 2 Air/Fuel ratio sensors? Is Bank 1 O2 sensor the "upstream front? Any other advice would be much appreciated thanks