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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 132 (Engine Control System Self Diagnostics) >> 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 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.
  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 for damage and proper operation. Thermostat is located behind thermostat housing which is located just behind the generator. If thermostat is defective, replace thermostat. If thermostat is okay, replace ECT sensor. For removal and installation of components, see REMOVAL, OVERHAUL & INSTALLATION - 4-CYLINDER article.
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