mine does too, learn to love the light.....
abs light is anti lock braking system. if this light stays on it can result in an mot failure.
You need to inspect the ABS units
ABS means Anti-lock Braking System. If the light is on and stays on, your ABS system has malfunctioned somehow and is not operating.
If your ABS light stays on you have a problem with the ABS and it is not functioning. Until the problem is fixed the light will remain on.
It means you have an issue/fault with your ABS
If the ABS light stays on, something in the ABS system isn't working properly, most likely the sensor. If it's rear-wheel only ABS, then the sensor is located on top of the rear differential. As long as the ABS light is on your ABS won't work but regular braking is unaffected.
A 1991 E 150 abs light will stay on when there is a problem with the abs system. Check the abs sensors at the wheels for a loose connection.
The abs light stays on when the computer has detected a malfunction and set a trouble code.
The battery light stays on when the alternator is over or under charging. The red brake light stays on when the parking brake is set or the fluid is low. The abs light stays on when the abs computer detects a malfunction and sets a code.
The abs light stays on when a malfunction has been detected in the antilock braking system. The abs computer will have stored fault codes.
When the ABS and Brake light come on, it means there is a problem in the ABS and Brake system. If the issue is resolved and the light stays on, a person can use a scanner and clear this light.
Check the abs wheel speed sensors. Or the abs module could be bad