Part and system guide
Throttle Body
The throttle body controls how much air enters the engine.
What it does
Opens and closes an air passage based on pedal input and idle control commands.
Failure signs
- High idle
- Stalling
- Hesitation
- Reduced power
- Throttle position codes
Maintenance notes
- Use throttle-body-safe cleaning methods.
- Some vehicles require idle relearn after cleaning or replacement.
- Check wiring and intake leaks before condemning the throttle body.