What does the pressure sensor on a Yamaha measure?

The pressure sensor on a Yamaha measures both atmospheric and intake pressure, which is crucial for the engine management system's performance. This sensor provides data that helps the engine control unit (ECU) accurately determine fuel delivery and ignition timing based on the current intake conditions.

Measuring atmospheric pressure allows the ECU to adjust for changes in altitude and weather, ensuring optimal engine performance under varying environmental conditions. Intake pressure measurements help monitor how well the engine is breathing and can reveal issues such as restrictions or leaks in the intake system.

Other options, such as measuring only exhaust pressure, fuel pressure, or oil pressure, would not account for the comprehensive role that both atmospheric and intake pressures play in engine management. This makes the pressure sensor's function vital for enhancing efficiency and performance in Yamaha engines.