Lexus GX470 2UZFE 89663-60D00_ST1_E2_SAP_EVAP OFF SV2 5000 p. Firmware
A guide to the Lexus GX470 2UZ-FE engine calibration labeled ST1, E2, SAP and EVAP OFF.
Lexus GX470 2UZFE 89663-60D00_ST1_E2_SAP_EVAP OFF SV2 5000 p. is a catalog entry for a modified engine-control calibration associated with the Lexus GX470 and its 2UZ-FE V8. The base identifier 89663-60D00 belongs to the Toyota engine-control calibration part-number family. The engine control module manages functions such as fuel delivery, ignition timing and emissions-system monitoring.
What the modified labels indicate
The filename identifies this file as an ST1, or stage 1, variant. That is a tuning label rather than a specification of its exact power or torque output. The accompanying E2, SAP and EVAP OFF labels point to emissions-related changes, but the filename alone does not establish the exact calibration edits.
SAP refers to the secondary air injection system. On a gasoline engine, this system supplies fresh air to the exhaust during certain cold-start conditions to help reduce emissions while the exhaust system warms up. The SAP label identifies that system as relevant to this variant, but does not by itself say precisely how the file changes its operation or diagnostics.
EVAP OFF indicates that the variant is intended to alter evaporative-emissions system monitoring or control. The EVAP system normally contains fuel vapors and routes them to the engine for combustion. A file labeled EVAP OFF should not be assumed to preserve the factory diagnostic behavior for that system.
Reading the calibration identifier
The related catalog entry 89663-60D00 identifies the base calibration without the modified filename’s additional labels. The suffix SV2 5000 p. is retained as part of the variant description, but its exact meaning is not established by the catalog name.
For diagnosis, the distinction matters: a warning light, readiness-monitor result or emissions-system fault may behave differently with a modified calibration than with the original software. The filename identifies the intended systems, not a complete list of disabled monitors or a guarantee of compatibility with every GX470.