Get a OBDB2 reader and its likely the code: P0051 - malfunctioning O2 Sensor Bank2, Sensor 1.
I got this issue and the fix was to replace the O2 Sensor on the passenger side.
With my 2004 LC, I needed to purchase Denso 2344138 O2 Sensor = Napa $85,00
I drove our 2004 Land Cruiser up on Ramps and replaced the sensor from underneath.
You'll need a 12mm socket to remove 4 bolts to drop the plastic undercover, then a special O2 socket to remove the Sensor.
Harbor Freight has this tool.
Kinda weird that the VSC and VSC Trac lights light up when its an Engine sensor, I would have just thought just the CE light.
Anyway, when done clear the fault code and all 3 lights will turn off.
I use the Torque Pro app and the ELM-327 OBD2 interface as my diagnostic tool.
I got this issue and the fix was to replace the O2 Sensor on the passenger side.
With my 2004 LC, I needed to purchase Denso 2344138 O2 Sensor = Napa $85,00
I drove our 2004 Land Cruiser up on Ramps and replaced the sensor from underneath.
You'll need a 12mm socket to remove 4 bolts to drop the plastic undercover, then a special O2 socket to remove the Sensor.
Harbor Freight has this tool.
Kinda weird that the VSC and VSC Trac lights light up when its an Engine sensor, I would have just thought just the CE light.
Anyway, when done clear the fault code and all 3 lights will turn off.
I use the Torque Pro app and the ELM-327 OBD2 interface as my diagnostic tool.