Throttle Body: Description and Operation

Throttle Body:

The throttle body controls intake air quantities. The throttle body assembly consists of:
- Aluminum housing
- Primary throttle body valve
- Throttle Position (TP) sensor
- Idle Air Control Bypass Air (IAC BPA) valve

The IAC BPA valve supplies small quantities of air to the engine during idle by regulating the amount of bypass air which passes through the throttle body. The TP sensor is mounted on the top of the RH side of the throttle body. It provides the Powertrain Control Module (PCM) with throttle position information.