DTC 55

The ABS module perform a self check for the following:
^ Ability of the controller to execute valid instructions.
^ Random access memory (RAM) integrity.
^ Read only memory (ROM) integrity.
^ Microprocessor wheel speed circuitry.

If a problem is detected, ABS will be disabled and the antilock telltale will be turned On.

DIAGNOSTIC AIDS
If Code 82 is also set, recalibrate ABS control module.

If Code 55 is the only code, replace the ABS control module.