For the past year, I have been seeing a following error message in my Citroen C4 Grand Picasso from 2014: "Electrical circuit fault: have your vehicle repaired". I tried to think about it really hard but I cannot remember if this error showed up first or if my old battery died first. The central locking system in the Citroen Grand C4 Picasso can malfunction due to a faulty door lock actuator, a damaged wiring harness, or a blown fuse. A certified mechanic can diagnose the issue and recommend the necessary repairs. Read the definitive used Citroën Grand C4 Picasso 2014 - 2018 review from What Car?. We tell you what you need to know before you buy. FwquIS.