Main Oxygen (Lamda) sensor or not???

[Glider]

Hi everybody,

checked fault codes on my LS after some electrical repairs, it came up with 3, so cleared them, and took the car for a 20 mile drive, then checked again, I have 1 fault code 21 main lamda sensor left bank (or oxygen) i then checked out what issues I might get because of this, and or symptoms, which were engine check light on rough running on idle and funny smells.....well I have none of these, has anyone else experienced  the same please, 

Many thanks

Phil

PS I will change the sensor just in case

 

[MLW]

Mine went in exactly that way. Engine management light on and car was running fine. An independent charged about £95 for the OEM lamda sensor (Lexus wanted £202!). About an hour and half labour to fit and test run. All Ok after. See VSC below.

 

[genius149]

I'm just trying to work out if mine has this particular fault. This video was enlightening 🤣

https://youtu.be/aJXVEcblFI4