VIDEO

Informace

Cadillac

Cadillac P0420

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit
Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

Cadillac P0420

Basic error definition

Catalyst System Low Efficiency Bank 1

Cause of DTC

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.