Some 2008-2009 Lexus vehicles equipped with the 2GR-FSE or 4GR-FSE engine may exhibit a MIL-on condition with DTCs P0128 (coolant thermostat below thermostat regulating temperature) and/or P0116 (engine coolant temperature range/performance problem).
This applies to 2008-2009 GS350, GS450H, IS250 and IS350 vehicles produced BEFORE the production change effective VINs as follows:
MODEL PLANT DRIVE PROD. CHANGE EFFECTIVE VIN
GS350 Tahara 2WD JTHBE96S*90045581
GS350 Tahara 4WD JTHCE96S*90023172
GS450h Tahara 2WD JTHBC96S*95019778
IS250 Tahara 4WD JTHCK262*95033047
IS250 Tahara 2WD JTHBK262*95099794
IS250 TMK 4WD JTHBK262*92094026
IS350 Tahara 2WD JTHBE262*95023043
IS350 TMK 2WD JTHBE262*92017385
REQUIRED TOOLS AND EQUIPMENT
TIS Techstream (software version 4.21.002 or later is required)
Super Long Life Coolant P/N 00272-SLLC2 (9.6 – 9.8 U.S. qts)
PREVIOUS P/N CURRENT P/N ITEM
16031-31020 SAME Water w/thermostat inlet sub-assembly
Using Techstream, check for any stored DTCs.
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