Warning Lights 2

[wineman69]

thanks for all postings have been reading all worst cases and now have big headach.was reading about loose gas cap and relised they where talking about the fuel cap.went outside to check cap and found it was not tightened correctly,have tightened it up to one click and started engine ,the warning lights still came on but engine back to full power and running perfectly fingers crossed how do i reset the codes as my 4wheel drive still not work cheers all