I have a 2003 sporting Seicento, the red warning light comes on whenever I go uphill and then goes off when back on the flat with no other obvious impact. Also every month or so the yellow engine light flashes 3 or 4 times and then goes off again with no other impact. Everything seems to be working fine, it always starts first time and oil, water, brakes and fluids are all fine. Should I worry about these lights ???