Search Results for ‘p0420’

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...

I have a 2004XLE with about 120k on it. I recently started getting a P0420 code. Clear it and it came back after a few short trips. Looking at the live data while sitting in Park, in the advanceauto parking lot with their code reader, the rear downstream O2 sensor was basically flat lined at...

In troubleshooting P0420, and later P0037, codes I decided to take a couple scans before and after the Bank 1, Sensor 2 (B1S2) replacement. Initially I was getting reoccurring P0420 codes, even after resetting, followed by a couple of days of driving. Last night I got the P0037 repetitively...

Hello, New to the forum! I hope you guys can help me out with this. A few days ago the car started blowing some white smoke out the exhaust. It didn't do it every time, or for very long. Water level was fine, oil looked fine (it was low so I added), and the smoke stopped coming back after a...

I have a 2001 Toyota Sienna. In 2010 a p0420 code popped up. I had it diagnosed by a toyota dealer and was informed that I needed a new ECM. In 2011 I had the toyota dealer replace the ECM. The next day the p0420 came back and this time toyota said I needed a new cat. I got a 2 year emmissions...

Multiple times in the past I've tried to jump in and offer some insight into how to handle P0420 / P0430 Catalytic Efficiency codes, both on this board and on a few others. There is a lot of confusion and misinformation out there. I thought I'd consolidate my understanding in one place, and...

Hi, I'm new here but our van has been serving us well for years, logging over 140K mostly trouble free miles. For the past few months though the ECM has been throwing codes for reduced cat efficiency. I'd reset it and the CEL comes back on after a few hundred miles. Looking around the web, I see...

I have been getting a p0420 code this month, and after lots of reading it maybe an o2 sensor (bank 1 sensor 1). I went under the van yesterday but could not put my hand on it. On an AWD do you have to mark and pull the driveshaft? If so does the tranny oil leak out? The only other way I saw is...

I thought that I would add some information on this sensor......Repair manual says to remove front passenger seat to access......not required.....you only need to remove the trim panel on the left side of the passenger seat.....the one right along the carpet......3 philips screws......pull back...

Going to try to get rid of this code. Think I have found a non stealership shop who has the equipment to tell WHAT is causing the code. Anyway, he stated that he did not use any aftermarket parts as many times they just didn't work right. So next week I will replace the aftermarket cat and O2...