i posted this on another forum but not many answers. My moms van which is a 2000 E-150 4.6 and 144,000 miles and the ABS light came on. Im in a shop class so i had her stop by and i read it using the schools scan tool and code C1230 was in self test mode but i didn't bother to check the memory. So i replaced the rear wheel speed sensor and the light went off...until you drive it then i comes on. So she stopped by the shop again and i checked the memory this time and code C1237 was in there, when i look on Mitchell ondemand it says these codes are the same but C1237 is Dynamic and C1230 is Static. So could it be the connector to the sensor or something else?