Have you taken the van for a good run to make sure the starter battery is properly charged? When I did my headlights and fitted LED DRLs I got the warning light initially. Took it for a run and have never had the warning return (2 1/2 years later). The battery must have got a bit low with doors open etc while I did the headlamp swap plus the change in bulb resistance. Charged up and a restart obviously was enough to reset it. Maybe worth a try if you’ve not been for a drive yet.I had the He's coded before and the light turned off when I had aftermarket hid bulbs, just need a time when I can actually get to someone who has it local