Toyota Repair: VSC LIGHT, air fuel ratio, toyota avalon

Question
MY VSC LIGHT AND CHECK ENGINE LIGHT COMES ON WHEN I START THE CAR AND STAYS ON ALL THE TIME. I CHECK THE CODE AND 11555 COMES UP. I WOULD LIKE TO NOW WHAT THE CODE IS AND HOW TO CORRECT THE PROBLEM. MY CAR IS A 2001 TOYOTA AVALON WITH A 100K MILES. LAST WEEK I HAD IT CHECK AND THEY SAID I NEED A O2 SENSOR I REPALCED BOTH SENSORS AND THE REAR BRAKE PADS.

Answer
I believe you are referring to the DTC PO1155 which is a malfunction with the Bank 2 sensor 1 air fuel ratio sensor, does the condition exist still after replacing both sensors?
The VSC light will come on anytime there is a check engine light, it means that the skid control function is disabled because of the check engine light.