Ah right I get ya
One of our 6.5 ton Iveco Dailies kept going into limp mode when driving, the driver plodded along with it for a few weeks before the problem got so bad the van was un-driveable. He had noticed though, if he put the clutch in it came back out of limp mode and picked up again.
We used an OBD data-logger when driving it, to see what the ECU was seeing at the point the problem returned - it was losing the crank angle signal. Checked the sensor with a sillyscope, working OK. Swapped the sensor from a similar van, same problem.
So we ruled the sensor itself out and spent a long time chasing the wiring loom through, couldn’t find a fault there. We eventually found the fault - we could stick a tyre lever into the hole in the bellhousing and move the flywheel back and forth, there was over 10mm endfloat! When the flywheel was moving backwards, it was moving away from the crank sensor, losing the signal. Stick the clutch in, the flywheel moved back, picked up again!
So we whipped the engine out and stripped the bottom end. To my surprise, there were no thrust washers in one end of the crankshaft, the crank had worn through the bottom end of the block, allowing an awful lot of end float. Only solution was a new block, crank and journals with thrust washers BOTH ends!
We got on to the dealers, as expected, that’s due wear and tear.
I argued for weeks with the local dealers, then Iveco UK and eventually Iveco head office at Turin.
Eventually, they acknowledged it was a design fault, not due wear and tear, and we settled on a new crank and bearings, with an understanding that if the same problem occurred in the next 300k kms, they’d replace the block too.
That van has now done over 600k kms, and no further problems!
We never got any goodwill for the labour or time spent offroad