I don't happen to know what a "51 reg 2 2 dti" is, however the throttle position sensor is found on the end of the throttle shaft.
Throttle Position Adaptation Error
fuel pressure reg throttle position or ASD relay
chain usually
The crankshaft position sensor can be found on the back of your 1.4-liter engine. You will need to remove the rear engine cover in order to access the crankshaft position sensor.
Have you checked the throttle cable?
hi there my glow plugs are needing changing i think, problems starting, but cant get in to get them off. Could you help me with this please.
The water temperature sensor is located on the front of the engine. You will find the sensor behind the thermostat housing.
it sounds like the throttle positioning sensor is messed up. try replacing it
Disconnect the vacumm line at the throttle body. If fuel is spurting from the vacumm line then the reg is bad.
just after your Airfilter
Blown head gasket or air lock in cooling system.
I am not that sure but I think you can call someone to come fix it.Or you can do the best you can.