Hi I have a 2012 Landrover Discovery 4 and I have a problem that I have been chasing for days now DTC C1A13-64 pressure not reducing when venting gallery.
I have replaced the compressor (Hitachi) all valve blocks, checked air lines for leaks numerous times, checked all electrical fitting and continuity of wiring for the suspension valve blocks and gallery, no problems found there.
When you start up the message confirm suspension height comes on and press for standard height and you get the DTC C1A13-64.
I have had this fault on other Disco 4s and the usual culprit is the pressure relief valve on the center block of the compressor
I suspect it might be a faulty ride level controller, purchased a secon hand one and fitted, of course the module is not recognised so down loaded the firmware and updated the module, still no recognition, changed back to the original control unit and get DTC C1A13-64.
Any ideas where to look next would be helpful.