Line Pressure Diagnostic Chart
WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 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).
- PC A solenoid.
- Main regulator valve in pump stuck.
|
| Low line pressure at idle all ranges |
- PC A solenoid concerns.
- Low fluid level.
- Blown out solenoid gasket filter (7H200).
- Line pressure blow off valve stuck open (on solenoid body assembly).
- Cross leaks due to loose bolts on the solenoid body.
- Line pressure skill valve in pump stuck open.
- Restricted or damage sump filter.
- Sticking pump regulator valve.
|
| Low coast clutch pressure |
- Wiring harness (external or internal).
- SSPC-A solenoid.
- Coast clutch assembly.
|
| Low overdrive clutch pressure |
- Wiring harness (external or internal).
- SSPC-B solenoid.
- Overdrive clutch assembly.
|
| Low intermediate clutch pressure |
- Wiring harness (external or internal).
- SSPC-C solenoid.
- Intermediate clutch assembly.
|
| Low direct clutch pressure |
- Wiring harness (external or internal).
- SSPC-D solenoid.
- Direct clutch assembly.
|
| Low low/reverse clutch pressure |
- Wiring harness (external or internal).
- SSPC-E solenoid.
- Low/reverse clutch assembly.
|