kangoo electric power steering intermittent at ignition

I have the misfortune and having a 2003 1.9 dci kangoo trekka and for a while it has not had the power steering start at ignition. Restart the ignition and it usually does then start. I'm having a few other problems with rough running and not starting lately and this has exacerbated the non starting of the power steering. Husband is wondering if it's something to do with the relay. Has anyone else had a similar issue. Steering never cuts out once running. Fluid is topped up and clear.