ABS light on again help!

[maximus]

About five months ago I had problem with the car starting when hot , and when it does start the car would idle poorly, with the help of several members here I changed the OVP,
O2 sensor ,plugs ,rotor and cap and which seems to have solved the problem but now my abs light came on but this time it goes off when i step on the gas my question now is what other symptoms could cause the abs light to come on besides the ovp
thanks guys