Line Pressure Diagnosis
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
If the line pressure is low at idle in all ranges check the following items:
- Low fluid level
- Restricted inlet filter
- Loose main body
- Solenoid body or accumulator body to case bolts
- Excessive leakage in pump
- Case
- Control bodies
- Sticking main regulator valve or damaged inlet tube seal on inlet filter
- Damaged gaskets or separator plate
If the line pressure is high at idle in all ranges then check the following items:
- Main regular valve
- Solenoid body and wiring harness
- Run Quick Test referred to in electrical diagnosis in this article