o2 sensor

Getting through baselining my new to me '93 FZJ80, and my next big project will be replacing the coolant hoses (to include the PHH and the heater control valve). Before doing that, I'm thinking of doing a PAIR delete. Some background... When I first bought the truck, there was an exhaust...

97 FZJ 80, European spec., delivered to Finland, no OBD2, 1FZ with 360 000 km on the clock. for the last 2000 km (starting in the dunes of Grand Erg Oriental/Sahara desert) the CEL came on intermittendly. When trying to get a code with the paperclip method: continuous blinking and after...

Hi, Does anyone have the part number for the mounting nuts for the oxygen sensors for a 1994 land cruiser? I can't seem to find it. Thanks

I'm looking for a quick check on my troubleshooting logic. I have a 94 with new denso o2 sensors that recently started to throw a persistent obd code 21 - heated o2 sensor on cyl 1,2,3. I swapped the two sensors, and expected that if the failure was on the o2 sensor side, to code would flip to...

Got P0037 code and replaced both downstream O2 sensors with Denso. Code came back on and took to my local shop but they were unable to diagnose and suggested going to dealer who may have better diagnostics. Any ideas before trying to navigate stealership nightmare?

Like some before me, I am searching for new O2 sensors for my 1994 Toyota Land Cruiser. The original Toyota kit has been discontinued, and other replacements seem to be hard to find. Other threads on here have sent me looking for DENSO 234-4520, but even that seems to be difficult to reliably...

O2 Sensor bypass question… So, to put rock sliders on my 96 LX450 (35s/529 gears) I had to cut out the cats and replace it w a straight pipe. The rear part of the pipe w the downstream O2 sensor was also cut out. So, there is no rear sensor just an empty plug. Obviously the check engine light is...

Had my 2001 LC parked for 2 weeks at the airport. Within 15 minutes of driving got the CEL. Threw my OBDII on there on saw that it said it was the Bank 2 Sensor 1 Heater something something. I guess it's front passenger. I reset it and it came back on within 5 min. Reset it again cold the next...

Hi folks, I'm reasonable sure I have this right but was looking for confirmation, as another member posted results in the past that claim what I am thinking is incorrect. Correct me if I am wrong please. HT1 orange HT2 grey, and +b (red/yellow)is the heater circuit? polarity should not...

Searched and searched without any answers. Here I have my 94 cruiser. Once warmed up the engine will run nice and smooth, but about every thirty seconds or so it gets really rough like it isn’t firing on all cylinders. Idles rough for approximately 10 seconds and then goes back to smooth. Does...

Yesterday, after dealing with P2447 for several months, I finally got around to installing the Hewitt Gen 2 SAIS Bypass Kit. Install went as good as expected (lost a bit of skin and blood but I've become accustomed to that). I did not install the block off plates, figured I'd save that for...

Ran Techstream before heading out to get a preliminary look at if I might pass emissions here in Denver, CO with my 02 LX.. Found some problems and will try to post the pictures or links. I'm guessing the 0.000 test value means the S1(s) is/are dead. But also, is it likely that it was a...

Trying to change bank 2 O2 sensor and it looks like the previous owner band clamped the o2 sensor as both nuts were missing from their bolts. Does anyone know what thread pitch those bolts are so I can buy two nuts and get this o2 secured to the exhaust pipe?

I'm stuck and need help please!!! (bold/underlined is the problem) I have a 2002 4runner limited 4x4. Things I've done "mechanically": - new engine (same 5vz-fe) 8 months ago - cold air intake 4 months ago - flowmaster super 40 - new catalytic converters 2 years ago My check engine light has...

I'm having a heck of a time troubleshooting an issue keeping my 96 FZJ80 from passing smog, and I'm hoping the braintrust on Mud can help me out with some diagnostic data. Does anyone have a graph showing good downstream O2 sensor data (at temp), preferably both idle and up in the 2k+ rpm...

My 94 cruiser was intermittently throwing code 28 for a heated o2sensor for cylinders 4-6. I would usually pull the EFI fuse and the code would clear for a while but I eventually decided to replace the o2sensor. I ordered the NTK part #244044 which is supposably the OE sensor for the 93-94's...

Hi all, Backstory: I recently purchased a 2000 with ~200k mileage here in New England. Windshield leaks (getting replaced this week, bad install), CEL on and throwing P0135 (Bank 1 Sensor 1 O2) But other than that, minimal rust on frame and beautiful body (was garaged most it's life) I...

I have a 1994 FZJ80 with the 1fz-fe. Looking in to a smog delete including egr, o2 sensor, etc. Cats are already removed. What all would I need to do these mods? Possible issues I could run in to? Related threads? How difficult would this be for the average guy?

Hey Mudders, I've searched quite a bit for similar posts to my issue, but I cant seem to find anything that helps explain what I'm experiencing. I'm hoping someone can point me in the right direction or has had a similar issue they were able to fix. The P0135 error is intermittent and can...

Just gonna post this up here, so maybe i can find it again later. This is a software problem, a firmware update could fix, but they will not roll it out. This throws O2 sensor codes, and then cyl codes as vehicle starts to misfire. Simple fix is to disconnect both O2 sensors in front of cat...