Explanation of 8 digit readiness code
| Readiness code is generated only when all display values = 0 | ||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Diagnostic function |
| 0 | Three Way Catalytic Converter (TWC) | |||||||
| 0 | TWC heating (not applicable/always "0" ) | |||||||
| 0 | EVAP system and fuel tank leak detection test | |||||||
| 0 | Secondary Air Injection (AIR) system | |||||||
| 0 | Air conditioning system (currently no diagnostic/always "0" ) | |||||||
| 0 | Oxygen Sensor O2S control | |||||||
| 0 | Oxygen Sensor (HO2S) heating | |||||||
| 0 | Exhaust Gas Recirculation (EGR) system (not applicable/always "0" ) | |||||||