I have a frequent intermittant problem with my 2004 1.6 HDI Picasso. Recently the cooling fan has cut in after the engine has been turned off. While this is normal, it should only run for a half a minute or so, but with me it can run for up to 20 minutes until I get sick of listening to it and disconect the battery for a minute. This seems to reset everything and the issue wil go away for a day or 2. Problem can occur after long or short journeys. The engine temp on the dash stays low while the fan is running.
Citreon garage don't have any answers. They thought it might have been a computer problem and dumped/reloaded the citreon software.
Any ideas what it could be??