EGR Problem

WARNING: This page is about a different car, the 1993 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.

EGR valve sticking open at idle is usually accompanied by a rough idle and/or stalling.

Also check for shorted or leaking injector and fuel-contaminated oil. If Code 45 is intermittent, see INTERMITTENTS in TESTS W/O CODES article in this section.

CODE 45 ECM TERMINAL & CIRCUIT WIRING IDENTIFICATION

Application	ECM Terminal	Wire Color
O2 Signal	D7	Purple
O2 Ground	D6	Tan

Fig 1: Code 45 Schematic (All Models) Rich Exhaust Indication

Fig 2: Code 45 Flow Chart (All Models) Rich Exhaust Indication