B1251 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1251 – Tire Pressure Sensor Low Battery No Sub Type Information
B1251 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1251 Possible Causes
Faulty Tire Pressure Sensor,Faulty Body Control Module (BCM),Body Control Module (BCM) harness is open or shorted,Body Control Module (BCM) circuit poor electrical connection
The Body Control Module (BCM) monitors the Tire Pressure Sensor. The OBDII code is set by the BCM in continuous memory when attempting to train a Tire Pressure Monitor System (TPMS) Warning Light ON sensor(s) with a low battery. The TPMS warning indicator flashes for 70 seconds and then remains on continuously when the ignition is turned to the ON position, and the message center displays TIRE PRESSURE SENSOR FAULT.