Temperature Gauge Sitting at 1 O'Clock (2002 S40 T4)

[ww1dm1]

Originally Posted by ww1dm1

Exactly what I noticed! My temp gauge acts extra nice, rises up quickly and locks in the middle every time. But when I hook up a scan tool I notice that it's sitting at the same spot even when the actual temp is 70 degrees and stays there even when 100 degrees are reached and the fans go on. The gauge is bull****.

Did a check for fun. The gauge reaches midpoint at ~70 °C and stays there until 110 °C, then goes up rapidly. Very non-linear and misleading.

[960kg]

Originally Posted by Volvophile

The car has also been plugged into a diagnostic reading which only threw up a faulty lambda sensor, but I don't think that would have any effect?

I would of thought all has been covered as to what the problem may be but seeing as you have a error code for O2 sensor that can effect the temp. of the engine as it depends how much fuel it lets deliver?

When detonation occurs through heat the ECU injects more fuel to cool it down so the reverse may be happening because of the faulty sensor, doubtful but could do!!

I would make sure all is ok with no error codes before you spend on other stuff.

[happy diver]

Is the sensor plug sound