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Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 13 (Engine Control System Self-Diagnostics - V6) >> Diagnostic Tests >> DTC P0116: Engine Coolant Temperature Sensor Circuit Range/Performance >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using Toyota hand-held tester or scan tool, check for any other DTCs. If only DTC P0116 exists, go to next step. If other DTCs exist, diagnose and repair those DTCs first and retest.
  2. Remove and inspect cooling system thermostat. Thermostat is on flywheel side of engine, where lower radiator hose connects. If problem exists, replace thermostat as necessary and retest. If problem does not exist, replace ECT sensor. ECT sensor is located on timing belt side of engine, where upper radiator connects and uses a 2-pin harness connector with White/Blue and White wires.
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