Pinpoint Test E : DTC B1251:00

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

E1 TRAIN THE TPMS SENSORS TO DETERMINE THE INOPERATIVE SENSOR

Train all 4 TPMS sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training .

Did all of the TPMS sensors transmit correctly and did the horn sound when each sensor transmitted to the TPM module?

Yes	CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
No	If the TPMS sensors fail to train, REFER to Wheel Rotation and Sensor Training Techniques