I had both the Check Hybrid System, engine and VSC warning lights. After trying a new Battery, disconnecting the isolation plug plugging in, nothing worked. I noticed the hybrid Battery coolant was low, so I topped it up. looks like the hybrid batteries might have been overheating. Not seen the messages since. Hope this helps.
Check Hybrid System Warning Light
in RX 300 / RX 350 / RX 400h / RX 200t / RX 450h Club
Posted
I had both the Check Hybrid System, engine and VSC warning lights. After trying a new Battery, disconnecting the isolation plug plugging in, nothing worked. I noticed the hybrid Battery coolant was low, so I topped it up. looks like the hybrid batteries might have been overheating. Not seen the messages since. Hope this helps.