Lexus Workshop Service and Repair Manuals

Thermostat Housing: All Technical Service Bulletins
Cooling System MIL ON/DTC's P0116 Or P0128 Set

L-SB-0004-10

January 14, 2010

MIL "ON" DTC P0128 or P0116

Service Category
Engine/Hybrid System

Section
Cooling

Market
USA

Applicability

Introduction

Some 2008 - 2009 model year vehicles equipped with a 2GR-FSE or 4GR-FSE engine may exhibit a MIL "ON" condition with one or more of the
following Diagnostic Trouble Codes (DTCs):

^

P0128 - Coolant Thermostat (Coolant Thermostat Below Thermostat Regulating Temperature)

P0116 - Engine Coolant Temperature Range/Performance Problem Use the following repair procedure to diagnose and repair customer complaint
vehicles.

Parts Information

Production Change Information