Unique

Several times a week, upon starting the car, my ABS light comes on and the brake light blinks. This continues until the car is turned off. The dealer cannot find and trouble codes being reported and has not been able to replicate the situation. The dealer did tell me that while the light is on the ABS system is not functioning. Any ideas on what the problem is?
thanks
charlie

skiracer

Have the dealer remove all four wheel speed sensors and clean/chack them for damage. Also check the wiring to the sensors. If these check out OK, then the fault lies in the electronics and who knows what the problem may be.