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IAC idle air control valve, mounted on the throttle body.
MAF Mass air flow meter, mounted next to air filter. Also known as AFM.
TPS throttle position sensor, mounted on the throttle body.
CPS crank position sensor, mounted near front belt pulley.
CAS cam angle sensor, mounted on the rocker cover.
PCV positive crankcase ventilation, mounted on the left hand rocker cover.
ECU electronic control unit, also known as,
PCM power control unit or,
ECM engine control module.