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 43 Schematic (4.0L) Bank 2 Oxygen Sensor Rich Exhaust

Fig 2: Code 43 Diagnostic Flow Chart (4.0L) Bank 2 Oxygen Sensor Rich Exhaust