Hello so I’m a newer owner of Lexus, I have a 98 LS400 and tonight my ABS light came on. At first I just had the check engine light on for the 02 sensor (sensor 1 bank 1). Then my VSC light came on without the ABS light on. Now tonight my ABS light came on. Could it be as simple as my 02 sensor? Any recommendations would be appreciated

 

Your O2 Sensor code for your Check Engine light is likely the O2 sensor needs changing

But no, a VSC light and an ABS light have nothing to do with an O2 sensor. Emissions are not related to brakes

It's possible your ABS and VSC failures are related, but it's not possible that the O2 sensor is why

Head to a local Autozone, Advance Auto, O'Reillys, etc and you can get your codes read for free

 

Independent faults developing on 3 seperate systems at the same time is really unlikely. How healthy is your battery\alternator? I'd get that tested while you're there too.

 

VSC (vehicle stability control) is basically a paranoid hypochondriac. It always fears and prepares for the worst.
The system pulls data from a very long list of sources. Most notably wheel speed sensors, ABS, various engine and transmission sensors but the list goes on…
VSC employs a variety of functions to automate vehicle stability. When the VSC warning light is on all the special functions are disabled.
ABS, traction control, and laser cruise (where applicable) to name a few. The ABS light isn’t telling you something is wrong with the ABS system it’s telling you it’s been disabled. Something else is causing VSC to panic and everything else is likely a byproduct of that.
Check the exhaust near the bank 1 O2 sensor there is likely a leak near it.