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
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 (Corvette) Rich Exhaust Indication

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