Line Pressure Diagnostic Chart
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
LINE PRESSURE DIAGNOSTIC CHART
| Test Results |
Possible Source |
| High line pressure at idle all ranges |
- Wiring harness (external or internal)
- Pressure Control Solenoid A (PCA)
- Main regulator valve in pump stuck
|
| Low line pressure at idle all ranges |
- PCA
concerns
- Low transmission fluid level
- Blown out solenoid gasket filter
- Line pressure blow off valve stuck open (on solenoid body assembly)
- Cross leaks due to loose bolts on the solenoid body
- Restricted or damage sump filter
- Sticking pump regulator valve
|
| Low coast clutch pressure |
- Wiring harness (external or internal)
- Shift Solenoid Pressure Control A (SSPCA)
- Coast clutch assembly
|
| Low Overdrive (O/D) clutch pressure |
- Wiring harness (external or internal)
- Shift Solenoid Pressure Control B (SSPCB)
- O/D
clutch assembly
|
| Low intermediate clutch pressure |
- Wiring harness (external or internal)
- Shift Solenoid Pressure Control C (SSPCC)
- Intermediate clutch assembly
|
| Low direct clutch pressure |
- Wiring harness (external or internal)
- Shift Solenoid Pressure Control D (SSPCD)
- Direct clutch assembly
|
| Low low/reverse clutch pressure |
- Wiring harness (external or internal)
- Shift Solenoid Pressure Control E (SSPCE)
- Low/reverse clutch assembly
|