Test Conditions

EGR failed in entire ignition cycle. Codes P013, P014, P015, P017, P021, P022, P031, P032, P034, P042, P043, P044 and P045 not set and 10 minutes have elapsed since closed loop fuel control was enabled. Coolant temperature 176-230°F (80-110°C), MAP between 40-75 kPa, engine speed 1350-2000 RPM with vehicle speed at 35 MPH or greater, EGR system at full 5 seconds prior to test, rear oxygen sensor toggles for 5 times per second and rear short term fuel trim is at 144 counts or less.