DTC P0420 Cadillac

Description

DTC P0016, P0053, P0054, P0059, P0060, P0068, P0101, P0102, P0103, P0106, P0111, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P013A, P013B, P013C, P013D, P013E, P013F, P0140, P0141, P014A, P014B, P0151, P0152, P0153, P0154, P0155, P0157, P0158, P0160, P0161, P0171, P0172, P0174, P0175, P0220, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0335, P0336, P0340, P0341, P0443, P0606, P0641, P0651, P1133, P1153, P1516, P2101, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, P2176, P2270, P2271, P2272 or P2273 is not set. The engine speed is greater than 900 RPM and the vehicle speed is greater than 43 km h (27 mph) for greater than 20 s. The fuel level is greater than 2 % if there is no fuel level DTC set, or greater than 0 % if there is a fuel level DTC set. The Engine Coolant Temperature (ECT) is between 73-128°C (164-262°F). The Barometric Pressure (BARO) is greater than 70 kPa. The catalytic converter calculated temperature is between 525-800°C (977-1,472°F). The Intake Air Temperature (IAT) is between -20 and +100°C (-4 and +212°F). The battery voltage is more than 11 V. Torque request is less than 5 N·m. The engine is in a decel fuel cutoff event for greater than 2.35 s. The Heated Oxygen Sensor (HO2S) 1 voltage is less than 300 mV prior to decel fuel cutoff exit. The HO2S 2 voltage is less than 101 mV for 2.5 s prior to decel fuel cutoff exit.