EGR Problem

EGR valve sticking open at idle is usually accompanied by a rough idle and/or stalling. Also check for shorted/leaking injector and fuel-contaminated oil. If code is intermittent, see INTERMITTENTS in TESTS W/O CODES - 3.4L/5.7L 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 (5.7L) Rich Exhaust Indication

Fig 2: Code 45 Diagnostic Flow Chart (5.7L) Rich Exhaust Indication