Fuel Pressure Regulator
Fuel Pump
EGR Vale
Oxygen Sensor
Idle Air Control
MAP Sensor
Knock Sensor
Throttle Position Sensor
Mass Air Flowmeter
Crankshaft Position Sensor
Ignition Coil
Alternator
Starter
Water Temperature Sensor
Oil Pressure Switch
Window Power Switch
Power Window Regulator
Knock Sensor ( Detonation Sensor )

What They Do
Detect cylinder block vibrations caused by engine knock and send a signal to the computer to retard ignition timing.
Failure Symptoms
Engine knock, loss of power, MIL light.
Maintenance/Service
Check connection and signal from sensor when complaints of engine knock are present. LOCATION On engine block or head.