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.

Fig 1: Code 45, Schematic, Rich Exhaust Indication

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