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ThushanthaSrimal

Normal operating coolant temperature

Question

Hi all,

My car is toyota vios 2007 and has 1.5 l 1NZ engine.

Recently I was driving a long trip and suddenly heat bulb started to blink. So I stopped the car and checked. Coolant level is fine and the fan is working. So after a while when I start the car bulb is off.

So I plugged a bluetooth obd reader and observed the coolant temperature while driving. It shows around 94c - 100c and blub never started to blink.

Is this temperature is normal? What is the temp level that blinks the bulb? Can that problem is a senser problem? 

Can anyone help.

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Hi,

toyotas have a 82'c t valve fitted from the factory,..

Taking into account the age of the vehicle,..you might wan check the valve for proper operation and replace with new coolant,..

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On 6/17/2019 at 5:38 AM, Twin Turbo said:

Hi,

toyotas have a 82'c t valve fitted from the factory,..

Taking into account the age of the vehicle,..you might wan check the valve for proper operation and replace with new coolant,..

Thankz....

Can the valve can give you faulty temperature? Does the ecu reads the temperature and give the red bulb at a certain threshold ?

 

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1 hour ago, ThushanthaSrimal said:

Thankz....

Can the valve can give you faulty temperature? Does the ecu reads the temperature and give the red bulb at a certain threshold ?

 

94°C sounds normal, the thermostat of my 1600CC fully opens at 95°C

 

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