Toyota and Lexus Firmware SW#89663-60E71- MOD_E2_sap_off
Catalog overview of Toyota and Lexus firmware SW#89663-60E71- MOD_E2_sap_off and its SAP-off variant label.
SW#89663-60E71- MOD_E2_sap_off is a modified Toyota or Lexus engine-control firmware entry identified by calibration number 89663-60E71. Its sap_off label indicates a variant intended to disable the secondary air injection system, which supplies additional air to the exhaust during cold starts to help reduce emissions.
What the SAP-off label means
In normal operation, secondary air injection supports emissions control while the engine and catalytic converters warm up. A SAP-off modification is associated with suppressing that function, but the filename alone does not establish exactly which controls or diagnostic checks have been changed.
The MOD_E2_sap_off suffix identifies this as a modified variant rather than a stock calibration. The related catalog name 89663-60E71 identifies the calibration family without specifying the same modification. The exact vehicle application and the meaning of E2 are not established by these names.