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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 730 (Engine Controls And Fuel - 2.0L - Introduction (2 Of 2)) >> Description and Operation >> Electronic Ignition (EI) System Description >> Modes of Operation

Modes of Operation

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

During normal operation the ECM controls all of the ignition system functions. If the CKP or either CMP sensor signals are lost, the engine will continue to run because the ECM will default to a limp home mode using the remaining sensor input. Each of the ignition coil/modules are internally protected against damage from excessive voltage. If one or more ignition coil/modules were to fail, a misfiring condition would result. Diagnostic trouble codes are available to accurately diagnose the ignition system with a scan tool.

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