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 ECM TERMINAL & CIRCUIT WIRING IDENTIFICATION

Application	ECM Terminal	Wire Color
3.4L "W" Body
O2 Signal	A16	Purple
O2 Ground	A22	Tan
3.4L (VIN S) "F" Body
Left O2 Signal	B21	Purple/White
Left O2 Ground	B20	Black/White
Right O2 Signal	B22	Purple
Right O2 Ground	B23	Black/White

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

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