Question about 1999 Volvo V70

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Fault Code P0116

I have a 1998 V70 GLT. The check engine light recently came on while the heater simultaneously began blowing cool air. I checked it on a small diagnostic computer and it reported code P0116. I'm thinking this is a temperature sensor or thermostat, but would appreciate some direction. Also, if it is a temp sensor, which one would it be and how difficult would it be to replace? Thank you!

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Po116 i know it is a coolant temp sensor,and if you have no heat u need to check the antifreez level

Posted on Jan 14, 2009

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The coolant temp sensor is the problem. They are available aftermarket, but the aftermarket ones are no cheaper than the dealer ones.
Definitely replace the thermostat at the same time.

thanks./

Posted on Jan 14, 2009

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Sir,

Temp sensor is located in the thermostat housing. It has a two wire connector. When reading the codes there should be a status message. That message will lend more information as to where the problem lies. Many sensors are going bad. You could replace the sensor and clear the codes and see what happens.

Posted on Jan 14, 2009

  • Asfiya Ahamed
    Asfiya Ahamed Jan 14, 2009

    Sorry sir the above comment i wrongly pasted. Please Ignore the message. The following is right one....

    Thermostat could be bad, " stuck open "

    thanks
    good luck


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The P0116 is a coolant temperature sensor trouble code. The most likely cause is a bad sensor, also check for corrosion on the connector and for broken or frayed wires. It is located in the coolant housing on the rear of the engine, be careful not to break the plastic clips that hold the sensor and note there is an o-ring that goes in place before the sensor.

Posted on Jan 14, 2009

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Temp sensor is located in the thermostat housing. It has a two wire connector. When reading the codes there should be a status message. That message will lend more information as to where the problem lies. I have seen many sensors go bad. You could replace the sensor and clear the codes and see what happens

Posted on Jan 14, 2009

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