Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System (Abs) - 5.3 & Abs/TC 5.3, Diagnosis - 911 CARRERA (996) >> Fault code 4225 - as of MY 2002 >> Incorrect wheel speed on one wheel >> Possible cause of fault