» » »

Volvo Q&A

Ask Your Question

1999 Volvo S70 Question: check engine light



jascoty, Greensboro, NC, January 19, 2009, 16:32

diagnostic says P O 116, engine coolant temp ckt range / perf

2 Answers
Flag This
  • Medium-star Best Answer
    January 19, 2009, 16:56

    If the temperature is reading low, or if the engine is taking longer than normal to get up to operating temperature, then your thermostat is sticking open and should be replaced, along with the coolant (if it hasn't been changed in the last 2 years or 30,000 miles).
    If the engine is running poorly or your having starting/stalling issues, then the coolant temperature sensor or wiring may be defective.
    If the coolant level is very low, this fault could occur, then you may have a coolant leak that will need to be addressed (Replace the thermostat too)

    Flag This
  • Answer #2

    March 03, 2009, 17:21

    It can be the coolant temperature sensor going bad. I have a 1998 S70 GLT that had this and was replaced twice. If have the coolant temperature sensor replaced you can also replace the thermostat at the same time since that are in the same area of the cooling system.

    Flag This