Test Conditions

EGR has not passed for 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. Engine coolant temperature 176-230°F (80-110°C), MAP 40-75 kPa, engine speed 1350-2000 RPM, and vehicle speed at 35 MPH or greater. EGR system on full, 5 seconds prior to test, rear oxygen sensor toggles 5 times per second, 5 seconds prior to test, and rear short term fuel trim is at 144 counts or less, 5 seconds prior to test.