melhug

Hi Steve,, Thanks for the reply I have now resolved this issue on a mates VCDS first pass of testing it showed a fault at the parking sensors of 01517 (J345) of the control module for the trailer/towing after a bit of head scratching as I have never had a tow bar fitted to the car I had a brainwave I realised that the Parkhilfe control box I had bought was used and that it may have been on a car that had a tow bar back on to the VCDS into control modules park assist there it was on the code a 1 in the control code to say trailer changed 1 to a 0 saved code fired the car up parking sensors working perfectly so to recap my original Parkhilfe control box was faulty as that had shown an error on the 2 middle parking sensors even after I had changed all of them thus resulting in that 5 second beep then nothing and when I changed the Parkhilfe control box it was giving the 5 second beep then nothing due to the fact it was expecting to see a trailer/towing control module hope that makes sense. Regards, Mel.

Hi had the same issue on my car 1st is the fan blowing try putting heater on full fan and feel to see if it blows at the vents if not its the fan itself part number 4F0820020A if they do blow check the coolant level is upto max mark as heater matrix is the highest part of cooling system if this is ok then you then may need to check the Heater Control Valve 4F2959617B see this video on youtube hope this helps Mel.

Hi first time on the forum this problem has been driving me mad for months now I get the long 5 second tone when first selecting reverse then nothing I have done the following replaced all the sensors replaced the Parkhilfe control box checked continuity of the cable from the sensors to the box and it remains the same I now have new sensors new control box and when car is in reverse all sensors make a ticking noise when you place your ear close to them dont know what to do next