Sensors present on almost all honda motors:

• Crankshaft Position Sensor - Determines timing for fuel injection and ignition of each cylinder and also detects engine speed.
• Top Dead Center Sensor - Determines ignition timing at start-up (cranking) and when crank angle is abnormal.
• Cylinder Position Sensor - Detects position of #1 cylinder for sequential spark ignition to each cylinder.
• Engine Coolant Temperature - or ''ECT'' thermocouple input for engine coolant temperature
• Intake Air Temperature Sensor - or ''IAT'' thermocouple input for intake air temperature
• Map Sensor - Manifold Absolute Pressure Sensor, allows ECU to adjust Air Fuel Ratio based on density of intake air
• Oxygen Sensor - Measures oxygen content of exhaust gas
• Pressure Atmosphere - or ''PA'' or ''Barometric Pressure Sensor'' measures atmospheric pressure.
• TPS Sensor - Throttle Position Sensor
• Vehicle Speed Sensor - or ''VSS'' measures how fast axles are turning
• Idle Air Control Valve / Electronic Air Control Vale - Or ''IAC/EACV'' Helps control idle

Optional sensors: - Electrical Load Detector - or ''ELD'' present in most US cars to measure how much electrical load there is

• Knock Sensor - A microphone-like device to listen for Pre Ignition, or knocking in DOHC VTEC motors.
• Pa Sensor - Atmospheric Pressure sensor
• VTEC Solenoid = solenoid to route oil flow to activate VTEC (on VTEC motors only :) )

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Other ECU Sensors not usually present on honda motors: - Maf Sensor