Engine-Codes
 
OBDII Code List
 
P0118 2001 TOYOTA COROLLA

P0118 2001 TOYOTA COROLLA - Engine Coolant Temperature Circuit High Input 3ZZ-FE Engine

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

Possible causes

  • Low engine coolant level
  • Faulty Engine Coolant Temperature (ECT) sensor
  • Faulty engine coolant thermostat
  • Engine Coolant Temperature (ECT) sensor harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
  • When is the code detected?

    An excessively high voltage from the sensor is sent to ECM.

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • P0118 2001 Toyota Corolla Description

    The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
    OBDII Code P0118 2001 Toyota Corolla - Engine Coolant Temperature Circuit High Input 3ZZ-FE Engine - Engine-Codes.com

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