EGR Problem

WARNING: This page is about a different car, the 1994 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 PCM TERMINAL & CIRCUIT WIRING IDENTIFICATION

Application	PCM Terminal	Wire Color
Left O2 Signal	C20	Purple/White
Left O2 Ground	C19	Tan/White
Right O2 Signal	C8	Purple
Right O2 Ground	C7	Tan

Fig 1: Code 45 Schematic (Fleetwood) Rich Exhaust Indication

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