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Vehicle History Starting from the beginning, I bought this Prius at ~125 miles with a p0420 code. A new Hybrid battery was installed just before...
Hello all. This is my first post. I searched the forum to look for similar symptoms, but couldn't find any. Because the CEL/P0420 only comes on...
Hey! Anybody know the part number for the o2 sensor (bank 1) that generates the p0420 error code? I have the dreaded light on the dash, using...
Hello all, I have an 08 with 276k miles. I've been driving with P0420 coming on and off for about 9 months now. Very tight budget and have been...
Currently on the side of the road. Had a history with a P0420 code for horror efficiency on catalyst. Noticed that my perch flow monitors were...
Hey! I have a AP200 and got a P0420 code, I am going to try two tricks one after the other to try to fix it: 1 - clean the cat via "Liqui Moly...
Hey guys! Just got my Autel obd2 scanner, ran the diagnostics and this is what I got : [ATTACH] [ATTACH] [ATTACH] [ATTACH] [ATTACH] I could...
My cat converter was stolen about 3 years ago and I had it replaced with after market kind. About a month ago the check engine light code came on...
While performing my recent inverter swap I went ahead and replaced my PCV valve (old one was still rattling, albeit a bit gunked up), cleaned my...
Hello, I’ve been lurking for over a year but am new to posting. I recently posted a diagnosis question and got some good feedback and figured I’d...
I was driving my 2008 prius yesterday and noticed the check engine light was on. I hooked up the OBD reader and got a code for P0420. Today I...
Hello everyone, I am writing this post to seek information from you about some issues I am facing. About 2.5 years ago, I bought a 2007 Prius...
Hi all, I’ve been troubleshooting (I mean, sitting on) a problem with my cat for awhile now. I’m running a ‘07 Prius with 300k miles on the...
I came across a post to solve the P0420 code using a spray can, and I would like to give that a try. However, the person who posted that article,...
I have a p0420 code have replaced both o2 sensors, mass airflow sensor, all 4 coils and plugs. Most were replaced before the code just in self...
I failed emissions in Illinois due to p0420 and p0137. I had my cat stolen about 2 years ago and replaced with an aftermarket. Steps taken so far:...
Hey y'all. P0420 on my 2007 Gen 2 found at emissions testing in Illinois. Aftermarket cat was installed after mine was stolen about 2 years ago....
Hello, My Toyota Prius 2008's Catalytic Converter was recently stolen for second time in the last couple of years. I have full coverage insurance...
P0172, P0300, p0301, p0302, p0304 P3191 and P3193 Hello. Multiple codes were pulled in June when I thought red triangle was the Hybrid Battery....
I've gleaned so much info from these forums over the years I've never had to make an account but here we go. Thanks everyone for your previous...
