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Pinpoint Test Ad : The TPMS (Tire Pressure Monitoring System) Warning Indicator Is Never Or Always On: Notes

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions 

See TPMS Warning Indicator. REFER to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION

If the tire pressure status message is missing for 5 seconds or less, the TPMS warning indicator remains in its last indication state (on or off) based on the last known good message received.

If the tire pressure status message is missing for more than 5 seconds, the IPC sets DTC U0140:00 and flashes the TPMS warning indicator for approximately 75 seconds then illuminates the TPMS warning indicator.

Possible Sources 

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