Walker 225-1230 Manifold Absolute Pressure Sensor

Walker 225-1230 Manifold Absolute Pressure Sensor

Walker Products 225-1230 is a manifold absolute pressure sensor for select Toyota applications. It is built for direct replacement use in engine management systems that rely on manifold vacuum and pressure data for accurate fuel and ignition control.

Key Features

• Manifold Absolute Pressure Sensor for emission control and engine management systems
• Direct-fit replacement for select Toyota Corolla, Matrix, and Celica applications
• Built by Walker Products, a long-standing manufacturer of fuel system and engine sensor components
• Manufactured to meet or exceed OEM standards and specifications
• Supported by Walker Products engineering, product management, and technical documentation resources

Product Details

The Walker Products 225-1230 MAP sensor is intended for vehicles that use manifold vacuum input to help the engine control module calculate load and adjust fueling. Accurate pressure signal input is important for drivability, emissions performance, and consistent engine response. This part cross-references Standard Ignition AS389 for the same application. Walker Products 225-1230 is a practical replacement choice for drivers and technicians servicing 2005-2006 Toyota Corolla, 2004-2006 Toyota Matrix, and 2004-2005 Toyota Celica models.

What It Helps Address

• Erratic idle caused by incorrect manifold pressure readings
• Hesitation or poor throttle response during acceleration
• Check engine lights related to MAP sensor signal faults
• Rough running from inaccurate engine load data
• Fuel control issues tied to vacuum sensor performance

Installation Notes and Tips

Verify the connector style, mounting location, and application notes before installation. Compare the old sensor to the replacement part number 225-1230 and confirm the vehicle’s year, make, and model against the listed fitment. After installation, clear diagnostic trouble codes and confirm that live data and idle quality are normal.

Quality Assurance

Walker Products has supplied automotive fuel system components and engine sensors since 1946 and operates as an ISO 9001/IATF 16949 certified company. The brand states its parts are manufactured to meet or exceed OEM standards and are backed by internal engineering and technical support.