I believe he meant 'Catalytic Converter' in the exhaust line.
Cleaning MAP sensor and throttle body solved idle vibration on my Vitz 2013. Mechanic took Rs:1500. He also cleaned the Iridium plugs. They were fine though straight out of the engine.
Ive been told what he didnt do was tune the ECU after the cleaning to better fuel mileage. Someone might shed light on this.