Lexus LX570 89663-60C20_ST1_E2_SAP OFF Firmware

89663-60C20_ST1_E2_SAP OFF REMOVE CONNECTORS SV 5000 p. is a catalog label for a modified engine-control calibration associated with the Lexus LX570 and its 5.7-liter 3UR-FE V8. The 89663-60C20 identifier belongs to the Toyota engine-control calibration family. The listed variant names a secondary air injection change, alongside Stage 1 and E2 labels.

Engine control and secondary air injection

The engine control module manages functions such as fuel injection, ignition timing and emissions-system operation. The secondary air injection system introduces fresh air into the exhaust during certain cold-start conditions. This helps the catalytic converters reach effective operating temperature sooner and reduces cold-start emissions.

SAP OFF indicates that this named variant is intended to disable the secondary air pump function in the calibration. The filename also says REMOVE CONNECTORS, indicating that connector removal is associated with this particular variant. The label does not identify the connectors or establish the exact software changes.

What the variant labels mean

ST1 commonly denotes a Stage 1 tuning variant. E2 is a modification label often associated with changes to catalyst-related diagnostics, but the filename alone does not define its implementation here. Neither label establishes a specific power gain or identifies every altered engine-control function.

The related catalog identifier 89663-60C20 provides the underlying calibration reference. The longer filename identifies the modified variant and should not be read as a description of every file bearing the shorter identifier.

Changes to emissions controls can affect diagnostic behavior and compliance with local road-use requirements. A calibration identifier alone also does not establish compatibility with every LX570 or 3UR-FE vehicle.