EGR Problem

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
Except Lumina
O2 Signal	B22	Purple
O2 Ground	B23	Tan
Lumina
O2 Signal	A16	Purple
O2 Ground	A22	Tan

Fig 1: Code 45 Schematic (3.1L) Rich Exhaust Indication

Fig 2: Code 45 Flow Chart (3.1L) Rich Exhaust Indication