24-06-2016, 11:18 AM
I've noticed it varies lots, a late ph1 DTurbo with lucas my brother had would be a fucker when warm, mum's bosch 405 barely needed any glow when hot, as evident by the much shorter time the light was on for.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.