Possible causes
– Faulty Left Rear ABS Sensor
– Left Rear ABS Sensor harness is open or shorted
– Left Rear ABS Sensor circuit poor electrical connection
– Faulty Wheel Speed Sensor
– Wheel bearing
– Left Rear ABS Sensor harness is open or shorted
– Left 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 C1236
Symptoms
– ABS light ON
FORD Technical Service Bulletins for C1236 code
2005 FORD F-150 ELECTRICAL SYSTEM
2005 FORD F-250 SD ELECTRICAL SYSTEM
2005 FORD F-350 SD ELECTRICAL SYSTEM
2005 FORD F-450 SD ELECTRICAL SYSTEM
2005 FORD F-550 SD ELECTRICAL SYSTEM
2005 FORD FREESTAR SERVICE BRAKES, HYDRAULIC:ANTILOCK:ABS WARNING LIGHT
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