Possible causes
– Faulty Rear ABS Sensor
– Rear ABS Sensor harness is open or shorted
– Rear ABS Sensor circuit poor electrical connection
– Faulty Wheel Speed Sensor
– Wheel bearing
– Rear ABS Sensor harness is open or shorted
– Rear ABS Sensor circuit poor electrical connection
– Faulty Wheel Speed Sensor
– Wheel bearing
Tech notes
There is factory service bulletin for the following Ford models:
2002 Ford Explorer
2003 Ford Explorer
2004 Ford Explorer
Ford Explorer Factory Service Bulletin OBDII Code C1237
Symptoms
– ABS light ON
FORD Technical Service Bulletins for C1237 code
2005 FORD F-150 ELECTRICAL SYSTEM
2002 FORD EXPLORER SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
2003 FORD EXPLORER SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
2004 FORD EXPLORER SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
2002 FORD EXPLORER SERVICE BRAKES, HYDRAULIC:ANTILOCK:CONTROL UNIT/MODULE
2003 FORD EXPLORER SERVICE BRAKES, HYDRAULIC:ANTILOCK:CONTROL UNIT/MODULE
2004 FORD EXPLORER SERVICE BRAKES, HYDRAULIC:ANTILOCK:CONTROL UNIT/MODULE
2002 FORD EXPLORER SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
2003 FORD EXPLORER SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT
1997 FORD E-350 SERVICE BRAKES, HYDRAULIC:ANTILOCK