Symptom Chart

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For vehicles with different front and rear tire pressures (such as the E-Series and certain F-Series), the tire pressure sensors must be trained following a tire rotation. Failure to train the sensors will result in a false low tire pressure event, which will cause the tire pressure monitoring system (TPMS) indicator to illuminate.

For vehicles with the same tire pressures for front and rear tires, tire rotation will not affect the system.

Failure of a TPMS component may not cause the message center to display a fault message or a DTC to be stored. The Symptom Chart is a starting point to begin diagnosis of these concerns.

Symptom Chart

Condition	Possible Sources	Action
Tire pressure monitoring system (TPMS) indicator ON solid when the ignition key is turned to the ON position and message center (if equipped) displays LOW TIRE PRESSURE	Spare tire currently in use	INSTALL the repaired road wheel/tire in place of the spare tire.
	Air pressure not set to specifications listed on the vehicle certification (VC) label	Go to Pinpoint Test E .
Driver door module (DDM) will not enter sensor training mode	Brake ON/OFF (BOO) switch	CARRYOUT the network test. Using the Log Viewer, VERIFY the correct DDM part number.
	Ignition switch Vehicle communication bus PCM DDM	Go to Pinpoint Test F .
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE PRESSURE SENSOR FAULT and DTC B2872 is present	TPMS sensor(s) TPMS sensor(s) not trained to the DDM DDM antenna DDM	NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors will go into a "sleep mode" to conserve battery power. It will be necessary to wake them up so they will transmit the latest tire pressure information to the DDM. ACTIVATE the TPMS sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Activation . Go to Pinpoint Test G .
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE MONITOR FAULT and there are no DTCs present in the DDM	Vehicle communication bus DDM Vehicle communication issue between DDM and instrument cluster Incorrect DDM	CARRY OUT the network test. Using the Log Viewer, VERIFY the correct DDM part number. If the DDM part number is correct, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the standard corporate protocol (SCP) communication bus and high-speed controller area network (HS-CAN) bus. If the DDM part number is incorrect, INSTALL a new DDM and RETEST the system for normal operation.
TPMS indicator FLASHES for 70 seconds and then remains ON solid when the ignition key is turned to the ON position, the message center (if equipped) displays TIRE PRESSURE MONITOR FAULT and DTC B287A is present	All TPMS sensors not trained to the DDM or all TPMS sensors are not installed DDM antenna DDM	NOTE: If the vehicle has been stationary for more than 30 minutes, the sensor will go into a "sleep mode" to conserve battery power. It will be necessary to wake them up so they will transmit the latest tire pressure information to the DDM. ACTIVATE the TPMS sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Activation . Go to Pinpoint Test G .
One or more sensors will not train	Tire pressure sensor(s) SCP communication bus HS-CAN bus DDM antenna DDM	RETRIEVE and RECORD DTCs. REFER to Tire Pressure Monitoring System (TPMS) Driver Door Module (DDM) DTC INDEX .