Many errors With my fiesta 2009 68ps (U0155, P1935, U0140)

Hello, I hope you are doing well!

I'm writing to you because I have a major problem with my 2009 Fiesta 68 hp diesel.

The problem is that, at times, the "i" icon with the cogwheel lights up on my vehicle, and then I have no response from the accelerator or the power steering. All the warning lights can come on, and suddenly everything returns to normal without doing anything. Sometimes, I also cannot start the vehicle; the anti-theft light flashes, and it is necessary to reset the DTS for it to be able to start.

(But at the moment, the car starts without any issues, the keys work, but the rest of the problem remains.)

I’ve tried going to the Motorcraft Service website to follow the solutions I saw for similar problems on the forum, but the file there only includes the BCE Modules, which were already correct!

I also attempted to perform the ABS Relearn vehicle data, but it does not work with my vehicle. I also tried changing various components such as the ECU, bcm, the alarm module, the ignition switch, etc., but nothing has changed. I am currently blocked without vehicule.

Here are the error codes:

(It showed 14V because the engine was running)

Code: U0155 - Lost Communication With Instrument Panel Cluster (IPC) Control Module
Status (-50):

Pending - malfunction is expected to be confirmed
Module: On-Board Diagnostic III

Code: P1935 - Brake Switch/Sensor Signal
Status (-2E):

DTC Present at Time of Request
Malfunction Indicator Lamp is Off for this DTC
Module: Powertrain Control Module
Freeze Frame #1:
EVENT_TIME: 38158273 s - Event time
TOTAL_DISTANCE: 209112 km - Total Distance
MODULE_VOLTAGE: 14.0 V - Control Module Voltage

Code: U0155 - Lost Communication With Instrument Panel Cluster (IPC) Control Module
Status (-26):

DTC Present at Time of Request
Malfunction Indicator Lamp is Off for this DTC
Module: Powertrain Control Module
Freeze Frame #1:
EVENT_TIME: 38158273 s - Event time
TOTAL_DISTANCE: 209112 km - Total Distance
MODULE_VOLTAGE: 14.0 V - Control Module Voltage

Code: U0140 - Lost Communication With Body Control Module
Status (-26):

DTC Present at Time of Request
Malfunction Indicator Lamp is Off for this DTC
Module: Powertrain Control Module
Freeze Frame #1:
EVENT_TIME: 38158273 s - Event time
TOTAL_DISTANCE: 209112 km - Total Distance
MODULE_VOLTAGE: 14.0 V - Control Module Voltage

Thank you for your help, and sorry for the translation—I'm French!

Have a great evening/day!