Lexus Troubleshooting Questions? Ask a Lexus Expert
Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner till early morning.
The VSC light is vehicle stability control. This system is controlled by the ABS. When this light comes on, it detects an issue with the sensors that are related with keeping the vehicle under control. The VSC system can effect the engine running by decreasing the power if it senses a loss of control or wheel spin. Yes you do need to get this code diagnosed and repaired but this did not cause the coolant loss or no start. You appear to have multiple issues here. The coolant loss may have been the engine overheating and if that occurred you may now have low compression from a damaged head gasket or head. Also coolant if from a leaking gasket or hose could of sprayed coolant onto connectors and this is disrupting electrical signals from sensors to the computer. Step one will be to see which codes are stored.
Thanks for using Just Answer, and rating me so I am compensated, Chris