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The fuel pressure sensor in the Lexus IS250 is positioned on the fuel rail, where it tracks pressure levels and relays this information to the engine control module (ECM). This setup enables the ECM to adjust for any pressure drops by taking necessary actions. Signs that may indicate a failing sensor include difficulty starting your Lexus, erratic performance, or the illumination of the check engine light (CEL). To replace the sensor, it's advisable to bleed the fuel line, disconnect the battery, remove the faulty FPS from the fuel rail, install the new one, and finally reconnect the fuel line and battery.
The fuel pressure sensor for the Lexus IS250 is positioned in the middle of the fuel rail and is connected to the engine's control unit.