Exhaust emission failure

My vehicle is a Peugeot 307 2006 1.6 16v manual model.

The vehicle has an Exhaust emission failure on the trip computer, the fault light is on. It shudders at idle and there is a decrease in traction. Today, the complete installation was dismantled because it could be from LPG, so the tube was canceled, it was not.

A different coil was tried, the problem continued again, the spark plugs were checked, no problem was seen. the problem still continues.

No solution has been found yet, tomorrow we will go to the brainman and he will look at it.

The following codes were output when the vehicle was connected to the computer.

P1336 No. 4 injector controller,

P1337 Fuel pump relay control failure,

P0121 Debrage contactor signal.

If anyone has any information that happened to you, I am waiting for their comments. I wish you good evening.