Crown Victoria V8-4.6L Flex Fuel (2008)
Low Tire Pressure Indicator: Testing and Inspection
Tire Pressure Monitoring System (TPMS) Indicator and Message Center Messages
The TPMS indicator and vehicle message center (if equipped) sometimes displays faults that cannot be resolved by the customer. Treat these messages
as TPMS faults that must be serviced.
Tire Pressure Monitoring System (TPMS) Indicator Illuminates Continuously
NOTE: A full-sized, matching spare wheel and tire, that is identical to the road wheel and tire, is available as an optional accessory. This spare wheel
and tire is equipped with a tire pressure sensor but the sensor is not initially programmed to the driver door module (DDM).
If this spare wheel and tire is in use on the vehicle, the sensor must be trained to the DDM and the remaining 3 sensors must be retrained to the DDM
as well. If all 4 sensors are not trained to the DDM, the tire pressure monitor system (TPMS) warning indicator will illuminate.
Make sure that all the wheels and tires installed on the vehicle are inflated to the correct pressure and trained to the DDM before attempting to
diagnose a TPMS concern. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training. See: Wheels and Tires/Tire Monitoring
System/Testing and Inspection/Programming and Relearning/Tire Pressure Monitoring System (TPMS) Sensor Training
NOTE: If the spare tire is in use (including the optional full-sized, matching spare wheel and tire), the damaged road tire must be repaired and
installed on the vehicle to restore complete TPMS functionality before carrying out any diagnosis.
NOTE: For vehicles with different front and rear tire pressures (such as F-Series and E-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 TPMS indicator to illuminate.
For vehicles with the same tire pressures for front and rear tires, tire rotation will not affect the system.
1. The TPMS indicator remains on continuously for the following condition:
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Low Tire Pressure - The TPMS indicator is illuminated solid and the message center displays LOW TIRE PRESSURE (if equipped). This is
displayed when any of the tire pressures are low. When this condition exists, the tire pressure must be adjusted to the recommended cold
pressure as indicated on the vehicle certification label.
2. NOTE: The TPMS sensors do not transmit when the vehicle is stationary. If the vehicle has been stationary for more than 30 minutes, it will be
necessary to wake up the sensors so they will transmit the latest tire pressure information to the DDM.
If the vehicle has been stationary for more than 30 minutes, activate the TPMS sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor
Activation. See: Wheels and Tires/Sensors and Switches - Wheels and Tires/Tire Pressure Sensor/Testing and Inspection/Tire Pressure Monitoring
System (TPMS) Sensor Activation
Tire Pressure Monitoring System (TPMS) Indicator Flashes
The TPMS indicator flashes for 70 seconds and then remains ON solid when the ignition key is turned to the ON position for the following conditions:
1. Tire Pressure Sensor Fault - If equipped, the message center will display TIRE SENSOR FAULT when a tire pressure sensor is malfunctioning.
GO to Symptom Chart. See: Wheels and Tires/Tire Monitoring System/Testing and Inspection/Symptom Related Diagnostic Procedures
2. No Communication With the DDM (TPMS is integral to the DDM) - The TPMS indicator is illuminated when the instrument cluster has received
no signals from the DDM for more than 5 seconds. If equipped, the message center displays TIRE MONITOR FAULT. GO to Symptom Chart.
See: Wheels and Tires/Tire Monitoring System/Testing and Inspection/Symptom Related Diagnostic Procedures
3. Tire Pressure Monitor Fault - If equipped, the message center will display TIRE MONITOR FAULT when the tire pressure monitoring system is
malfunctioning or communication with the instrument cluster has been lost. GO to Symptom Chart. See: Wheels and Tires/Tire Monitoring
System/Testing and Inspection/Symptom Related Diagnostic Procedures