Delphi PS10121 Manifold Absolute Pressure Sensor

Delphi PS10121 Manifold Absolute Pressure Sensor

The Delphi PS10121 manifold absolute pressure sensor provides OE-style pressure signal monitoring for engine management systems. Built from Delphi’s OE heritage and application knowledge, it is a direct-fit replacement for select Cadillac, Buick, and related GM vehicles that need accurate intake manifold pressure data.

Compatible With 2004-2009 Cadillac CTS, 2005-2009 Cadillac STS, 2005-2008 Buick LaCrosse, 2004-2006 Buick Rendezvous, and 2004-2006 Cadillac SRX.

Key Features

• Delphi PS10121 MAP sensor for emission control and engine management applications
• Black connector with rectangular shape and female connector gender
• 3-terminal blade connection for OE-style electrical interface
• Bolt-on mount type for direct replacement installation
• Plastic sensor body for underhood use
• Package contents include the manifold absolute pressure sensor and instruction sheet

Detailed Description

This manifold absolute pressure sensor measures intake manifold pressure so the engine control module can calculate load, fuel delivery, and ignition timing. Delphi PS10121 is built for select GM applications, including Cadillac CTS, Cadillac STS, Buick LaCrosse, Buick Rendezvous, and Cadillac SRX, where stable MAP sensor input is critical to drivability and emissions performance. Delphi’s OE background is reflected in the connector layout, terminal design, and bolt-on fitment.

This part cross-references Standard Ignition AS305 for the same application.

Common Issues It Can Help Address

• Rough idle caused by inaccurate manifold pressure readings
• Hesitation or poor throttle response from faulty MAP sensor data
• Check engine light conditions related to manifold pressure signal faults
• Hard starting or unstable fuel control from incorrect engine load input
• Emissions performance problems tied to sensor output errors

Installation Notes and Tips

Verify connector shape, terminal count, and bolt-on mounting before installation. Inspect the harness connector for corrosion, bent terminals, or damaged locking tabs, and confirm the intake manifold port is clean before seating the sensor. Use the included instruction sheet and follow the vehicle service procedure for the exact application.

Quality Assurance

Delphi builds this MAP sensor using OE experience and application knowledge developed through long-term supplier relationships with major automakers. That background supports consistent signal accuracy and fitment for the listed Cadillac and Buick applications.