Volkswagen Passat Forum banner

ccm ac alternator

  1. VAGcom cannot read CCM, reports communication error ???

    Volkswagen Passat B5 Discussion
    Any idea what this means? Ever since my battery and alternator died and were since replaced, my CCM keeps my air conditioning on all the time except when I turn off the climatronic. Clearing the codes does nothing as there is a communication error with the CCM only. My mechanic is stumped, he...