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Home >> Toyota >> 2016 >> Highlander XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 170 (SFI System [2GR-FXE] - Diagnostic Codes - (Hybrid) (2 Of 3)) >> SFI System >> DTC P0128: Thermostat [02/2014 - 08/2014] >> Description

DTC P0128: Thermostat [02/2014 - 08/2014]: Description

WARNING: This page is about a different variant/trim than selected.

This DTC is stored when the engine coolant temperature does not reach 75°C (167°F) despite sufficient engine warm-up time having elapsed.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0128 Thermostat All of the following conditions are met for 5 seconds (2 trip detection logic):
(a) Cold start
(b) The engine is warmed up
(c) The engine coolant temperature is less than 75°C (167°F)
  • Thermostat
  • Cooling system
  • Engine coolant temperature sensor
  • Center exhaust pipe assembly
  • ECM
Comes on DTC stored