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OBDII Code List

P1116 2008 TOYOTA PRIUS - Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System

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

  • Coolant Heat Storage Tank
  • Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage)
  • Low engine coolant level
  • Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection
  • Faulty engine coolant thermostat
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1116 2008 TOYOTA PRIUS Description

The coolant heat storage (CHS) tank outlet temperature sensor is used for monitoring coolant temperature in the vicinity of the outlet port of the heat storage tank of the CHS system. The resistance of the sensor increases when the CHS tank outlet temperature is low, and conversely, the resistance decreases when the temperature is high. The changes in resistance are reflected in the voltage that is output by the sensor. The ECM monitors the sensor voltage and uses this value to control CHS system properly.
OBDII Code P1116 2008 Toyota Prius - Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System -

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P1116 2008 TOYOTA PRIUS Comments

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Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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