My ABS and Brake light come on and stay on what could cause this? on 2002 Chevrolet Astro

It occurs often.code C0265 was stored.wiring to the abs controller checked.Mechanic suspects abs control unit to be bad.Is this possible or does the both lights me the control unit is finding a problem?

Asked by for the 2002 Chevrolet Astro
1265 is a wheel speed sensor. are you sure the code was 265??

1 more answer
You've probably got a bad wheel sensor covered in rust, a rusty pulse wheel, or wires broken or pulled off. These are by far the most common issues.