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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 431 (Automatic Transmission - 10-Speed Automatic Transmission - 10R80 (Diagnosis & Testing - General Procedures)) >> Diagnosis And Testing >> Special Testing Procedures >> Line Pressure Test >> Line Pressure Diagnosis Chart

Line Pressure Diagnosis Chart

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Test Results  Possible Source 
HIGH at IDLE Wiring harnesses
LPC solenoid
LPC valve
LOW at IDLE
OR  Does not change when commanding LINEDSD# up and down		 LPC solenoid mechanically stuck OFF
Fluid inlet filter/seal
Main control valve body
Main pressure regulator valve stuck in spring compressed position
Broken or missing main pressure regulator valve spring
Pump
Separator plate

A no-drive condition can exist even with correct transmission fluid pressure because of inoperative clutches. Refer to the Clutch Application Chart to determine which clutch is applied in each gear range. A clutch concern can be further diagnosed by performing the air pressure test.

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