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
Mass Air Flow Meter

What They Do
Measure the weight of the air entering the engine. This information is used by the computer to supply the correct amount of fuel.
Failure Symptoms
Hard start, hesitation, stalling. Maintenance/Service Check for trouble codes and tap sensor lightly. Replace if engine stumbles when tapping sensor.