Toyota SW#89663-0C710-B MOD_E2_sap_off Firmware
A catalog overview of Toyota calibration 89663-0C710-B and its modified secondary air injection variant.
SW#89663-0C710-B MOD_E2_sap_off is a modified Toyota engine control calibration whose label identifies a secondary air injection, or SAP, off variant. The associated 89663-0C710 catalog number belongs to Toyota’s engine control software family.
What the SAP-off label means
On an engine equipped with secondary air injection, the engine control module commands air into the exhaust during certain cold-start conditions. The added oxygen helps the catalytic converter reach effective operating temperature and reduces emissions while the engine warms up.
The sap_off label indicates that this modified file is intended to disable secondary air injection-related operation or monitoring. The name alone does not establish exactly which commands or diagnostic checks have been changed. MOD_E2 identifies it as a modified variant, but the catalog name does not explain the meaning of E2.
Calibration context
The related 89663-0C710 entry identifies the underlying software family. Its name does not carry the SAP-off label, so that feature should be associated specifically with SW#89663-0C710-B MOD_E2_sap_off, not assumed for every file under the base number.
The available identifiers do not establish an exact vehicle application or the changes in revision B. Disabling an emissions-control function can affect fault detection and emissions compliance.