codes p1211,p1212 what parts need replacing

I have experience have put injectors, glow plugs,clutch, etc. where is ignition pressure regulator located?

The IPC is located in front of the engine just to the right of the fuel filter also while your at it check your IPR if you are using an OBDII its of no use as it wont read correctly you need a VARUS scanner any respectable auto shop should have one