Camshaft Position Sensor
WARNING: This page is about a different car, the 2002 Hyundai XG350, 2002 Hyundai Sonata, 2002 Hyundai Santa Fe, 2002 Hyundai Elantra, and 2002 Hyundai Accent. However, it is still accessible from the selected car via links, so may be relevant.
Camshaft Position Sensor (CMP) sensor detects No. 1 piston at TDC of compression stroke. ECM uses input for fuel and ignition control. For CMP sensor testing, see CAMSHAFT POSITION (CMP) SENSOR under SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING article.