Notes On Intermittents

Drive vehicle with TPS position between 8-15 degrees, and engine at 1450-1650 RPM to try and duplicate code. Remove EGR valve and check for excessive carbon build up that would restrict EGR flow, or foreign materials holding EGR valve open. Check for pinched, cut, kinked, misrouted or blocked vacuum passages and/or vacuum hoses, reducing EGR flow.

Fig 1: Schematic, Code EO48, EGR System Fault (1 Of 2)

Fig 2: Flow Chart, Code EO48, EGR System Fault (1 Of 2)

Fig 3: Flow Chart, Code EO48, EGR System Fault (1 Of 2)