ABS Light

[DrRobin]

For the last 3 mornings the ABS light has stayed on after start up. If I stop the engine and start up again, it goes out as normal and it doesn't stay on in the evening.

My battery was a little low so I put a little bit of a charge in it last night, but the ABS light was the same this morning. Could it be cool damp air, but I haven't had the problem before.

I checked for fault codes whilst the light was on, but didn't see any, although the fault reader I used might only read the basic codes, I have another reader that should read the codes.

If I can't find any codes what are the things to check?
- Sensors;
- Brake pads;
- Wear limits (do they light the ABS?);
- ABS pump;
- Something else.

Thanks