DTC P0221-00: Throttle/Pedal Position Sensor/Switch 'B' Circuit Range/Perform: General Description

The Gasoline Direct Injection (GDI) system injects high pressure fuel directly into the combustion chamber. The high pressure injectors have an internal swirl disk which rotates with fuel flow to help atomize the discharging fuel. This causes the fuel to evaporate rapidly, which reduces inlet air temperature. This cooler atomized air/fuel inlet charge increases power output. Each high pressure injector is connected to ECU with 2 lines. First line is high pressure side and second line is low pressure side. If any line of these two connections is short to battery or ground, ECU sets DTC.