As title I have had some problems with my current CCM not shutting down and it then drains the battery. I have replaced it with a second hand one from a breakers yard. I have re-programmed to the same softcodes as my previous unit, but this unit is unable to see the rear doors I get errors 01333 and 01334 no comms to rear doors. I have put my old unit back in which works fine with the rear doors! Does this sound like a bad second hand unit? 01334 - Door Control Module; Rear Right (J398) 49-10 - No Communications 01333 - Door Control Module; Rear Left (J388) 49-10 - No Communications Any ideas folks? Central locking closes everything except the rear doors, no comms at all.