I have finally bought a fiat stilo 1.6 3 door which I have wanted for ages. I have used the FiatECUScan and it has came up with:

P0704 clutch pedal. invalid signal
P1555. signal low
P0235 boost pressure (1)

And it judders and idles on start up at about 1200rpm

Really want to sort the faults so I can actually have the car I have wanted for ages

Thanks

Have you tried deleting the faults?
It seems strange that it has a boost pressure fault as there won't be a turbo on it!!
If you haven't tried already I would suggest deleting the errors. They might all be old ones from previous faults.
Mick

Hi I thought that to. I cleared the faults and they came back although I was in simulation mode apparantly as it popped up saying I needed the registered version but unfortunately im to skint to buy it atm . I think the juddering is a failing coil pack but I didn't know how to check which one.

Thanks

HickRm said:

Hi I thought that to. I cleared the faults and they came back although I was in simulation mode apparantly as it popped up saying I needed the registered version but unfortunately im to skint to buy it atm . I think the juddering is a failing coil pack but I didn't know how to check which one.

Thanks

Click to expand...

If the juddering is happening at idle, you can detect which coil is failing by disconnecting the lead to each coil pack in turn. The coil that doesn't make any differnce when disconnected is the one to replace.

But if the fault only occurs under load, then you'll need to get the car plugged in to fault-finding diagnostics to tell you which cylinder is failing.

Thanks I will try that when I finish work I am guess with the fiat ecu scan I am using the wrong one or wrong settings as I am using the free one

Stupid question but do I disconnect them one by one while it is running?

HickRm said:

Stupid question but do I disconnect them one by one while it is running?

Click to expand...

Yes.

P1555 means you've pressed the brake and accelerator pedals at the same time. The ECU nevers expects that to happen so interprets it as a fualt.