1. Fault Code & Freeze Frame
Mode 02 / Mode 04
PID 0x0C (RPM)
2200 RPM
PID 0x0D (SPEED)
45 MPH
PID 0x04 (LOAD)
52 %
PID 0x05 (COOLANT)
88 °C
Risk Warning (Mode 04 Clear):
Clearing DTCs turns off the Check Engine Light but instantly invalidates all ECU Emissions Readiness Monitors. The vehicle will fail state inspection until drive cycles are complete.
2. ECU Readiness & Drive Cycle
Emissions State
Misfire Monitor
READY
Oxygen Sensor Monitor
READY
Catalyst System Monitor
INCOMPLETE
Evaporative (EVAP) System
INCOMPLETE
Step 0/3 Completed
3. ISO 15765-4 CAN Frame Bus Traffic Log
WORKBENCH STATE PROOF:
DTC P0420 Active | MIL ON | Monitors Incomplete