Good morning, I have a problem with a G.punto 1.3 MJT year 2010 cod 199A2000 55 KW, I have replaced the rocker arms of the tappets and the timing chain because it was broken, now when the work is finished I get the error C0109 (Rail fuel pressure sensor). The car starts but is in recovery, the error already appears when the engine is switched off, i.e. when the error is cancelled when the engine is switched off, it immediately reappears. However, trying the car on the road I can take a reading of the diesel pressure without any problems. the connector is intact and we have also replaced the pressure sensor without solving the problem.

do you have any indications ? I am beginning to have doubts about the Ecu.