Engine Temp Gauge Failure - X250 Ducato (2009) 2.3 Diesel

[23addy46]

Hi all - I think that i put out an enquiry post to Nick (Euroserve) a few days past re the above - but as no replies - now im not shure that i did post it ???

I am in sincere hope Nick is OK and still fullfilling us with his unbeatable knowledge re Fiat's Ducato. Can any member help out please re the under bonnet / engine location of any Temp Sender Unit ? have already checked all relavants fuses !!! 

Many Thanks

Dave Adams

[Keithl]

Dave,

I cannot find any previous post of yours about your temperature gauge, your last post in February was about a different topic.

@Euroserv last logged on to the forum last Thursday so maybe send him a PM and ask your question directly. https://forums.outandaboutlive.co.uk/profile/2818-euroserv/

Keith.

[Derek Uzzell]

I notice that much the same question was asked on the Fiat Forum in 2020

https://www.fiatforum.com/threads/ducato-x250-2008-2-3-130bhp-location-of-coolant-temperature-sensor.479242/

The advice provided was as follows

I think it screws into the thermostat housing located on the front side of the engine to the left of the dip stick. I think there is one sensor that feeds into the ECU. The ECU uses this signal to operate one or both cooling fans as required and sends a signal to the BCM and then to the instrument panel via the CAN to show the temperature.

I believe the sender looks like

and this video

https://www.youtube.com/watch?v=OnwD_5sFo3

indicates that it screws into the thermostat-housing that is on the side of the motor close to the motor's front. You should be able to spot the thermostat-housing as a large-diameter rubber coolant hose will be attached to it.  The video's quality isn't great and relates to a left-hand-drive Ducato, so I'm not sure how accessible the sender is - but I'm guessing it should be possible to remove/replace the sender without too much dismantling.

Red arrow on this image gives an idea where to look

I'm sure Nick will be able to provide an accurate informed answer based on practical experience.

(It's perhaps worth observing that a non-functioning coolant temperature gauge on the dashboard does not automatically mean the temperature sensor is the culprit.)

[Alanb]

Is this not an analogue gauge on the x250, which is what I would expect.  Analogue gauges on modern vehicles are typically electronically driven by stepping motors.  Before you start draining the cooling system etc. please see this recent thread. The post by onecal is worth noting. https://forums.outandaboutlive.co.uk/topic/58930-fuel-gauge/#comment-703906

Alan