Readiness Code, Function

NOTE: OBD II legal regulations require a display (readiness code) that shows inspection readiness for the annual exhaust emissions test. The readiness code shows that every component and/or system that affects exhaust emissions, which can lead to the MIL switching on, has been operated at least once with positive results.


The readiness code is reset and/or erased every time:
- DTC memory is erased (either with display group 01 function 05 or display group 33 mode 4)
- ECM harness connector is disconnected from ECM -J192- (e.g. connecting test box VAG 1598/19, replacing ECM, etc.)
- Battery is disconnected.