Test Conditions

EGR failed in entire ignition cycle. Codes P013, P014, P015, P017, P021, P022, P024, P031, P032, P034, P042, P043, P044, P045 and P075 not set and 9.2 seconds have elapsed since closed loop fuel control was enabled. Coolant temperature 176-230°F (80-110°C), MAP between 50-80 kPa. Engine speed between 1250-1850 RPM and vehicle speed at 35 MPH or greater. Ignition voltage at 11 volts or greater, and 5 seconds prior to test EGR system at full, rear oxygen sensor toggles for 5 times per second and rear short term fuel trim is at 135 counts or less.