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Home >> Saturn >> 2003 >> Ion 1 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Sensors & Switches >> Camshaft Position Sensor
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Camshaft Position Sensor

NOTE: The ignition system does not use a conventional Camshaft Position (CMP) sensor that detects valve train position. The Ignition Control Module (ICM) detects when No. 1 or No. 3 cylinder has fired on the cylinders compression stroke using sensing circuitry integrated within each coil. This system is called compression sense ignition.

A malfunction in Camshaft Position (CMP) sensor circuit can set a DTC. For testing procedures and specifications, perform related DTC testing procedure. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 2.2L ION article.