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Which sensor ???
it is located on top of the bell housing behind the engine
how do you reset engine light on 1991 volvo 240
I have a 240 and with the knock sensor unplugged it will still start so I would have to say no.
Yes
Check the temperature sensor. You should be able to find a resistance value in your manual. If it is within specs, check to make sure the wire to the sensor is not grounded. Quick check would be to unplug the wire from the sensor. If the temperature goes down to cold it is probably the sensor. If not, there could be a short in the wire to the sensor. Worst case scenario is that the guage itself is faulty but the sensor or the wire is more likely.
The 2015 Volvo XC70's engine produces 240 hp @ 5600 rpm.
The 2012 Volvo XC70's engine produces 240 hp @ 6400 rpm.
The 2013 Volvo S80's engine produces 240 hp @ 6400 rpm.
The 2014 Volvo XC60's engine produces 240 hp @ 6200 rpm.
The 2015 Volvo V60's engine produces 240 hp @ 5600 rpm.
The 2014 Volvo S80's engine produces 240 hp @ 6400 rpm.