Differential pressure sensor problem – Fiat Ducato

A couple of weeks ago, whilst driving, the amber coloured engine management light came on on the Fiat Ducato’s dashboard. The manual suggests driving at a moderate speed and contacting a Fiat dealer, so I did both. The difficulty with the engine management light is simple. The light comes on to indicate a fault, but gives the user no clues about the fault! I had no idea at that stage that a differential pressure sensor problem was the issue.


Differential pressure sensor problem

The amber coloured engine management light can indicate a number of faults – including a differential pressure sensor problem

The motorhome was taken into North East Truck and Van where it was hooked up to the heart attack monitor. Various tests and diagnostics were carried out. Investigations revealed the fault lay at the differential pressure sensor! Parts were ordered and a repeat visit to the dealer was arranged for the parts to be fitted.

Second trip back and the parts were not correct, so further parts were ordered. These were apparently sent from Turin, but in the time they took to arrive, I could have driven to Turin to collect them. Well, I would have done, but with the engine management light on, was the Fiat good to go, or did she need to be laid up. I spoke to Fiat UK who did not give a view one way or the other, so I opted for the lay up and cancelled our mid-week plans.

Alas, I am unable to offer any information about what a differential pressure sensor is, what it does or indeed if Tesco sell them, but I understand it is something to do with a “diesel particulate filter” (DPF)  – and there is plenty of pleasant reading on the web about that!

Replacement parts arrived at the dealership and today the issue seems to have been resolved…



  1. Neil August 21, 2018
    • Motorhome Voyager August 21, 2018
    • Fraser Gill February 20, 2019

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