Firstly, simply cleaning the wheel speed sensors will not make the problem go away if the ASC-T light is being illuminated because of a faulty wheel speed sensor(s). They will obviously need to be replaced if they are defective. That said, there is a chance that the light is being turned on for some other reason. Check all related fuses and relays, and then have the car scanned. If all fuses/relays and wheel speed sensors check out okay, it's most likely a faulty control module. You can have the wheel speed sensors tested, too.
1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
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