Let the engine computer know when the power steering system is working hard with the Standard Ignition Power Steering Pressure Switch PSS59. It fits many vehicles, among them the 2001-2007 Ford Escape, 2000-2003 Ford Focus and 2005-2007 Mercury Mariner, as a direct-fit OE replacement. See the "Vehicles it fits" section for the full list.
The switch monitors pressure in the power steering system and signals the engine control system when that pressure rises, such as during low-speed or parking maneuvers. This lets the idle speed be adjusted for the added load from the pump.
- Quality control: As a global manufacturer of aftermarket automotive products, Standard Ignition maintains complete quality control throughout the manufacturing process.
- Direct-fit OE replacement: Each switch is designed as a direct-fit replacement for the original, for straightforward installation.
- Durable build: Made from high-quality materials intended to withstand extreme conditions.
- Tested: Undergoes extensive testing for reliability.
Signs this switch may need replacing include the idle dipping, or the engine stalling, when the steering wheel is turned at low speed. Fluid seeping from around the switch is another sign. If a failed pressure switch is the cause, this part replaces it. Diagnose the system before replacing the switch.
Interchange: PS1564 · PS495 · PS351 · YS4Z3N824BA · PS351SB · PSS8 · PSS59T
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
PS1564, PS495, PS351, YS4Z3N824BA, PS351SB, PSS8, PSS59T
Frequently Asked Questions
What does a power steering pressure switch do?
It monitors power steering system pressure and signals the engine control system when pressure rises, so idle speed can be adjusted for the added load from the pump.
Is this a 2001-2007 Ford Escape ignition switch?
No. PSS59 is a power steering pressure switch, not an ignition switch. It is a direct-fit OE replacement for the power steering pressure switch on the listed applications, including the 2001-2007 Ford Escape.
Will it fit my 2000-2003 Ford Focus or 2005-2007 Mercury Mariner?
Yes, both are listed applications for PSS59. Check the "Vehicles it fits" section to confirm the match for your specific vehicle.
What are signs this switch may need replacing?
Signs include the idle dipping or the engine stalling when the wheel is turned at low speed, and fluid seeping from around the switch. Diagnose the cause first, because other faults can cause similar symptoms.
Is it difficult to install?
It is designed as a direct-fit OE replacement for straightforward installation. Follow the vehicle service information for the procedure, and check the power steering fluid level afterward.
