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
5.7L "Y" Body
Left O2 Signal	D6	Purple
Left O2 Ground	D17	Tan
Right O2 Signal	D22	Purple
Right O2 Ground	D17	Tan

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

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