Help With A Fault Code

[foamsmith]

Please help.

 

I have a 2009 C5 exclusive tourer with park assist.

 

The parking system is faulty,   I connected a "Snap on " diagnostic and got 2 faults..

 

The left rear exterior sensor    and

 

" 43972  (ABC4)  undiagnosed fault.

 

 

I replaced the sensor  it  erarsed the first fault code  but the parking system  is  giving a fault reading every ime I start the car.

 

The secong fault code remains and I have no idea what it is for ..

 

Can anybody help or do I have to visit my main dealer and spend money ???

[paul.h]

To find out what the fault is you are probably going to have to use a Citroen specific Lexia type code reader, at a dealer or copies can be bought from ebay for around £100 to put on to a lap top - however, there is a recent post where using a copy one caused a parking system fault http://www.citroen-owners-club.co.uk/citroen/topic/20714-c5-08-exclusive-front-parking-sensors-problem/