OBD diagnostic advice sought.

[mprowe]

Hi,
I'm hoping that someone can point me in the right direction to get to the bottom this troublesome problem?

The following are the log files for the MultiECUscan Error reports for the Engine and Body computers.

(Multiecuscan 4.0)
 02/09/2019 17:13:57
   Fiat Ducato (type 250) 2.2 Multijet
   Visteon CF4/EOBD Diesel Injection (2.2)
--------------------------------------------------------------   
  ISO code: 75 07 83 08 DC  
  FIAT drawing number: 9666484580 
Hardware number: 9666360280 
Hardware version: 00 
Software number: 9666484580 
Software version: 0000 
Homologation number: 661440  
 ECU programming date: 07/13/2010  

READING ERROR CODES: 
1. U0426 - Electronic key   
  ERROR DETAILS:   
  Engine temperature: 24.4 °C   
  Engine speed: 1104 rpm   
  Fuel quantity: 0.0 mm³/i   
  Gas pedal position: 0.00 %   
  Fuel pressure: 287 bar   
  Boost pressure: 1008 mbar

(Multiecuscan 4.0)
02/09/2019 17:16:17
 Fiat Ducato (type 250) 2.2 Multijet
Body Computer Marelli (250)
--------------------------------------------------------------

 ECU ISO code: 40 83 46 08 E6
 FIAT drawing number: 1364523080
Hardware number: BC250C.0000
Hardware version: 01
Software number: 03440020207
Software version: 0606
Homologation number: 000118
 ECU programming date: 08/06/2010

READING ERROR CODES:
1. B1003 - Key transponder

It has the feeling to me, that I am looking at two ends of the same problem?

I keep clearing the errors but at each trip out (the Ducato is a Motorhome) they return.
Dashboard warning lights are not activated. And I have not noticed any symptoms while driving.
My worry is, that this is an issue with the Vehicle Immobilizer System and that sooner or later it will let me down!

Best regards, Martin