my stillo 1.6 estate has problems with the ecu ,i keep getting engine fault but fiat check it out and say there was a sensor problem and it was replaced .but 2 months later problem came back the car could not hold the idling speed, the revs were going up and down so i took it to my local dealer who said they could not identify any problem and after clearing the fault code it is now running ok again.has anybody any idea what the problem is as am now getting close to crisis point .my car is a 03 and i have owned it for 8 years.

hi trebornoals

depends what the fault code was... do you know what code came up and what sensor was replaced?

there's lots of sensors that could effect the idling so without knowing its kinda hard to advise you