MPX4250AP 2.5 Bar MAP Sensor

The MPX4250AP is a precision 2.5 Bar Manifold Absolute Pressure (MAP) sensor ideal for use in naturally aspirated and moderate boost automotive engine management systems. It’s the factory-spec sensor included in the Classic MegaSquirt-2 and MegaSquirt-3 Kit ECUs, providing stable and accurate pressure readings up to 21 PSI of boost. Engineered by NXP (formerly Freescale), the MPX4250AP offers a fast response time and excellent linearity across a wide operating range. Whether you're building a custom ECU or replacing a damaged sensor, this component delivers reliable performance for fuel mapping, ignition control, and barometric correction. Key Features: Pressure Range: 20 kPa to 250 kPa absolute – Equivalent to 2.9 PSI to 36.3 PSI absolute – Supports up to ~21 PSI of boost (above atmospheric) Supply Voltage: 5V ±0.25V Output Voltage Range: 0.2V to 4.9V (typical) Accuracy: ±1.5% typical at 25°C Response Time: <1 ms Temperature Range: -40°C to +125°C Package: Small Outline Package (SOP) Port Style: Top-mounted vacuum port fits 3/16” ID hose Applications: MegaSquirt-2 and MegaSquirt-3 Classic ECU Kits Naturally aspirated engines Turbocharged and supercharged setups up to 21 PSI boost Custom EFI projects requiring a reliable 2.5 bar MAP signal