Your engine temp sensor is usually near or in the thermostat housing, here it is on a 1.6, coloured green on mine. First of all you need to get a linear potentiometer (variable resistor) of the right sort of range. Here’s a chart of eng temp against resistance (ohms) for the Stilo range. As you can see, it ranges from 170ohms at 100 degrees C Originally Posted by ducato MiltonKeynes The temp sensor is wired straight into the ECU which then controls the cooling fans and sends a voltage to the temp gauge to show the coolant temp. First change the temp sensor. If no better check for bad connections including re-seating the ECU connectors (battery disconnected). Put old sensor back in and code goes away so must be an issue with the new sensor being wired incorrectly. After a while idling the original code came back telling me the voltage from the sensor was intermittent. A genuine FIAT one is £100 online or £150 from the stealers. Then there is the diagnostics of £100 at least. 0. Sep 2, 2021. #4. After a longer than usual storage period due to covid, the speedo, rev counter, fual and temp gauges weren't working on my 2008 Ducato 3.0 based moho, although the rev counter did eventually burst back into life. I checked the cluster PCB for solder cracking as I'd had this on a Ford Focus which are notorious for this, and When your cars not running right, not starting, fans coming on when cool, then test your coolant temperature sensor, it could of be your problem. A great dia Good morning. I was just wondering if anyone else has had a problem with the ext temp displayed on the dash. Mine is wildly optimistic. I was wanting to replace the temp sender unit but it seems as though I have to buy the whole mirror. Has anyone found an alternative way. Buying the temp This is because the P0115 Fiat code is referring to the ECT SENSOR, and the dash gauge is operated by, usually a one-wire SENDER. Basically a different sensor that the code doesn’t refer to.) 2. If the engine temperature is abnormally high, around 280 deg. F, that’s abnormal. Unplug the sensor on the engine and see if the signal drops to This sensor also contains a thermostatic switch for a high temperature warning light. Both sensors are in the thermostat housing area indicated by you, that is towards the vehicle LHS of the engine. The ECU sensor has two flat blades in line, whereas the gauge sensor has the blades at right angles. Views. 691. Apr 5, 2023. bugsymike. B. Ducato. Thought I would replace the thermostat due to very slow warming. Thermostats are available at 81 82 88 and 90 degrees opening. Which one is normal on a 2.8 Part # 34273 (Sender, Water Temperature Gauge) (Red)http://www.international-auto.com/index.cfm?fa=p&pid=2545&posid=868332&noapp=1Part # 34373 (Switch, Temp k4lSiY.