oxygen sensor

Excellent video from @gloverman may be of help! Many have asked for o2 sensor locations (both primary and sub) on the LS400 and Kelvin shows you exactly where they are. (I think some call them lambda?) Remember that the sub oxygen sensors monitor the catalytic converter, not fuel mixtures...

Thanks @gloverman

Great video from Kelvin @gloverman that is worthy of its own thread.

Been chasing down a running rich issue for a while now and I made a scary breakthrough tonight. All four O2 sensors are randomly and simultaneously flatlining. When it’s running normal, upstream sensors will oscillate between 0.1 and 0.7 ish volts and the downstream sensors will hold relatively...

Hi all, I have transplanted a 1993 Lexus LS400 engine and trans into my 1960 Ford F100 pickup. I am getting about 10mpg so suspect the oxygen sensors. The ones I have are the bolt in type with 4 wires. I have a spare 1995 engine that has the stainless exhaust manifolds (ones on Truck are heavy...

having removed the cat and sub oxygen sensors from my 1uz (it's fitted in a cobra) can anyone tell me what voltage the ECU needs to get for it to think that the cat is working properly and the error coe can be canceled. I've read 0.45 volts but not sure if this is correct. thanks al

How crucial are the lambda (oxygen) sensor and air temp sensor to the performance of a 1UZ? When using OEM wiring and EMU it is probably not even possible to run the engine without those, but with an aftermarket EMU there's a choice. My belief is that the engine was designed to work with those...

So this is in my race car... I know on my old EFI (Bosch based Toyota setups), the o2 didn't do anything at higher rpms.. what's the impact of having them out or not working in a race setting?

hi guys i need to know what colour the oxygen sensor wires are at the ecu. ive had a bit of a look at diagrams on the net but i cant find much on the o2 sensors, or maybe im not understanding the diagrams properly. any help will be greatly appreciated. cheers, dan

These OE oxygen sensors are not very old (maybe a year or so) and were removed from a running motor with no faults or error codes. They are the single wire type that screw into the manifold/header before the cat. Part number 89465-24040 (part number has now been updated by Toyota to...

Hi all, I've been lurking here for a while but have not posted. I have come across a 1UZ swapped cressida (someone elses unfinished project) and I'm trying to get over the issues that it has. Currently it has main O2 sensor codes (21,28). I have briefly checked the connections, everything...

Hi all, Got a question about O2 sensors - I'm fitting a 1uz soarer engine into an old lotus. I have the soarer manifolds with the O2 sensors but not the sub O2 sensors post the CATs. My car will not have any CATs. I intend to use the primary O2 sensors in the manifold, and not use the sub...

Item: 'Innovate Motorsport' oxygen sensor and air/fuel raito guage kit Location: Hobart I bought this as a kit for about $360. Mounted is an existing mount hole in my manifold so I did even use the weld on hole and plug that is included. Good kit. Check out google with reviews - Seasonal...

I have a four wire unit on my 1uz, I was wondering if there was a way to rewire both my primary o2 sensors together and run it at my y-pipe (MKIII with 1uz). The reason is because reaching the o2 sensors in the stock location is a major pain the rear. I'm sure I tie the signal wires...

What's the thoughts/experience on o2 sensor location - I was told to fit mine no closer than 1000mm (39 inches) as they will run too hot and overheat, requiring regular replacement? I ended up mounting it 750 mm (30in) from the turbo. I'm running a WBo2 dual wideband unit with external display...

Hi guys, I am upgrading from the standard exhaust to a rear mounted turbo, and I am wondering where I should put the EGT sender and the 02 sensor. Should I just run the EGT probe directly before the turbo, and the o2 one directly after it (Using only 1 probe and 1 o2 sensor instead of the...

Hello fellow 1UZFE owners, Any recommendations on O2 sensors? I priced out the OEM at Lexus and they want $257 ea. A dealer mechanic friend of mine (Honda) recommended that I do not use aftermarket for risking to damage the engine control - (if the amperage ratings are different). I was...

I am about to install an AEM wideband gauge in my ride, and It says to put the O2 sensors 18" downstream from the exhaust. Now on the LS or SC would this be possible??? What have some of you guys done with your setup?? Thanks in advance,

I have 3-5 used primary O2 sensors. $20 each plus shipping. I am only charging $10 for shipping regardless of quanity. These are primary oxygen sensors. They attach to the headers. I will test them out before shipping.

Hi all, I stupidly bought the wrong sensors (ie. sensor with the wrong number of wires) as the LS400 in the US and Japan are different. I now have two 2 wire sensors and the car has single wire sensors. As both are unheated and the extra wire is earth (which 1 wire sensor does through its body)...