For 1990-2009 cars

### Scan Tool Method

Use a scan tool in order to clear current diagnostic trouble codes and history diagnostic trouble codes after a completed repair.

DTC B1019, DTC B1025, DTC B1051, and DTC B1053, are latched and can not be cleared. Latched DTCs require replacement of the SDM after correct diagnostics.

### Flash DTCs

Flash DTC diagnostics do not clear DTCs or read history DTCs.