3.5 V6 Si Series 2 on 2002 Mitsubishi Diamante

I have anti locking light on a couple of times on r/h top corner of desh , last couple days it hasn't come on ,but now it's come back on ,do you have any thing I can try to fix the problem?

Asked by for the 2002 Mitsubishi Diamante
ABS codes are retrieved by using a scan tool or grounding pin #1 of the data link connector, turn the ignition key to the on position and counting the flashes of the ABS light. The number of flashes will correspond to a particular fault code. Check the brake fluid level first top up if required.
Thanks very much,it was the brake fluid.