Significance of figures in 8 digit number block, display zone 1 - Readiness code
| The readiness code is generated only when all display zones show 0 | ||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Diagnostic function |
| 0 | Three Way Catalytic Converter (TWC) | |||||||
| 0 | Three Way Catalytic Converter (TWC) heating (currently no diagnosis/always "0") | |||||||
| 0 | Evaporative Emissions (EVAP) Canister system (Tank ventilation system) | |||||||
| 0 | Secondary air system | |||||||
| 0 | Air conditioner (currently no diagnosis/always "0") | |||||||
| 0 | Oxygen Sensor (O2S)s | |||||||
| 0 | Oxygen Sensor (O2S) heating | |||||||
| 0 | Exhaust gas recirculation (not installed/always "0") | |||||||