o2 sensor

P0420. Comes back roughly every 500 miles after I clear it because the light bugs me. Read quite a bit of other posts about this but couldn't find a definite answer. I understand it's hard to know what actually is causing the code. After checking most things (exhaust leaks, cat temps, o2...

Hey guys, I just got on the form and am getting familiar with it, I hope I am putting this in the right place. I am having some issues with my 2003 Accord. Last week I was driving on some mountain roads and noticed when I got to the top and parked that there was a slight burning smell, smelled...

Hello all. Trying to get my Accord fixed up for the years to come. My CEL start coming on and off, and now stays on. Error code P420 if I remember right. I have a 2010 EX-L with the 3.5 V6. My question is if anyone has had experience with replacing these O2 sensors. I’m going to start at the...

I bought this car used recently and the last thing I have to fix is the Bank 1 Sensor 2 (downstream) O2 sensor. I've been browsing forums and googling questions for about a week and I cannot for the life of me find this sensor on my car. Does anybody have a diagram showing its location or some...

Hi everyone, New to the forum, been browsing around here since October of last year when I bought a 05 Coupe I4 AT. It had ~128k when I bought it, we've put about 2K on it since then. It was only being driven 1-2 times a week for short (<10 mile) trips until January of this year, when my...

Hi everyone - here's the story: I live in Ontario, Canada and there is a mandatory biannual emission testing. I have a 06 Accord 4-cyl (about 243K km) and for the longest time the check engine light would be on but intermittently it would go off. I know from using an Android app (Torque Pro)...

Maybe a simple question. I drive a 2008 Accord EXL 2.4 L auto. I have had very sluggish highway acceleration for about a month, while having a 0420 code (Cat Converter) that popped on and off for about two months prior to that. It is currently off and has not come on in 4 weeks. My engine has...

I've been searching the internet trying to find any solid information about the location of the secondary/downstream oxygen sensor for my car. I have a 2002 Accord with a F23A1 engine and I can't seem to find anything very specific to my car. I took a peak under the car to see if I could spot it...

About two weeks ago, my check engine light came on and after half an hour of driving, it turned itself off, so I thought nothing of it. Come today and it comes back on out of nowhere after driving home from school for, like, 5 minutes. Immediately going straight to AutoZone to get an OBD test...

At 303k miles I had a check engine light and read code P0139: I cleared the codes, and after 3k more miles, I still had no check engine light. However, since I have >300k on the o2 sensor, I decided to change it anyway. It is a pretty simple exercise, but I included some pictures below...

I forgot the exact CEL code # but it was for an evap system/o2 sensor code that was brought up. The problem is that when the car is idle(not moving) (5speed manual): I can have that car in neutral and press on the gas the car will not rev above 4k. Now when I drive the car can rev past 4k and...

so can anyone tell me the difference betwen the pre cat and the post cat O2 sensor for my accord, i need to replace both i think, but i dont know what is the difference i/ve been looking on ebay but i can only find post cat, and i saw a youtube video in wich they look exactly the same :S. can...

Hello. Newbie here. I have searched the posts but cant find much related to my problem.A month ago I bought 1999 Honda Accord LX coupe (4 cyl. ,Automatic,104K miles, no mods, no warranty from dealer) that keeps throwing codes P0171 and P0170. It runs like normal and i have not notices a drop in...

Hi there, I have a 04 Accord LX I4 sedan with 136K miles. Recently the CEL came on (not flashing) for a couple of times. Both time the gas tank just hits half empty. For the first time, it went off by itself after I re-tightened the fuel cap and drove a few miles in two days. Today CEL was on...

New to the forum and recently bought an '03 Accord with California Emissions. I live in the EasT Coast. P0420 code pops up so I replaced the o2 sensor with a Denso 234-4363 Oxygen Sensor, which is a California legal o2 sensor. CEL came back on and did some thermo tests on cat, found out it was...

Until earlier this year, my gas mileage was steady in my 2003 Honda Accord EX. I could drive about 387 miles to the tank in town and close to 500 miles to the tank highway. The mileage did not differ significantly during different seasons of the year. When the check engine light came on in March...