To be or not to be

[Guncha]

Hey, mates!
I bought used Ibiza 2007 1.4 100PS with BBZ engine from SEAT dealers. Theres 50k miles on the clock. I know that car had 1 owner and car was serviced properly
Everything started after driven 50 miles - EPC and Check engine lights on and limp mode.

After scanning faults and new MAP sensor, plugs, air filter and brake pedal sensor nothing is changed.

The fault codes are:

01314 - Engine Control Module: No Communications
Possible Causes
CAN-Databus Wiring/Connectors from/to Engine Control Module faulty
Fault(s) stored in Engine Control Module
Engine Control Module recently flashed or re-mapped

6804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold
Possible Causes
Leakage in Intake and/or Exhaust System
Catalyst faulty
Oxygen Sensor(s) faulty
Oxygen Sensor(s) Control faulty

17550/P1142/004418 - Load Calculation Cross Check: Lower Limit Exceeded
Possible Causes
Mass Air Flow Sensors (G70) faulty
Intake Air System faulty/leaking (false Air)
Throttle Pedal faulty
Throttle Body dirty/faulty

18265/P1857/006231 - Load Signal: Error Message from ECU
Possible Symptoms
Malfunction Indicator Light (MIL) active

Possible Causes
Fault Code(s) stored in Engine Control Unit (ECU)


Unidentified codes 17961 un 17912

Any ideas, experience? What to do next?

 

[R3k1355]

Take the car back and get your money refunded??

Sounds like half of them could be a boost leak and/or they never cleared the fault codes when the last lot of problems were fixed?

 

[Guncha]

Take the car back and get your money refunded??

Sounds like half of them could be a boost leak and/or they never cleared the fault codes when the last lot of problems were fixed?

Thanks for reply!
I didnt go to stealers, but took it to my friends car service to change MAP sensor.
Other things I did myself

 

[Guncha]

200 miles since throttle body cleaning+alignment and no limp modes or EPC/Check engine lights.
Fingers crossed