Diagnostic Aids
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
If DTC P0446 or P1441 is also set, diagnose those DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
If engine will not start and DTC P1640 is set, a fault may lie in the main relay control circuit.
If A/C is inoperative, see appropriate MANUAL A/C-HEATER SYSTEMS article.