EGR Problem

EGR valve sticking open at idle is usually accompanied by a rough idle and/or stalling. 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
All Others Except 3.8L
Oxygen Sensor Signal	D7	Purple
Oxygen Sensor Ground	D6	Tan
3.8L
Oxygen Sensor Signal	D3	Purple
Oxygen Sensor Ground	D2	Tan

Fig 1: Code 45, Schematic, Rich Exhaust Indication

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 45, Flow Chart, Rich Exhaust Indication

Courtesy of GENERAL MOTORS CORP.