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What is the working principle of the Focus sensor?

2 Answers

OAlivia

08/31/25 5:33am

The working principle of the Focus crankshaft position sensor is to provide signals for ignition timing and confirm the position of the crankshaft, which are used to detect the top dead center of the piston, the angle of the crankshaft, and the engine speed. The following is the removal method for the Focus crankshaft position sensor: 1. During removal, disconnect the sensor wiring harness from the main wiring harness near the rear of the intake manifold. 2. Remove the nut securing the crankshaft position sensor wire clamp on the fuel pipe mounting bolt, then remove the crankshaft position sensor mounting bolt. 3. Remove the crankshaft position sensor and the clamp for the crankshaft position sensor wiring harness. 4. During installation, insert the projection of the crankshaft position sensor into the hole in the transmission housing so that the end face is flush. 5. Install and tighten the two mounting bolts of the crankshaft position sensor with a torque of 17-21 N·m. The two bolts used to secure the crankshaft position sensor to the transmission are specially designed to ensure the correct gap between the sensor and the flywheel. Other bolts must not be used as substitutes for these special bolts. 6. Connect the wiring plug to the crankshaft position sensor, install the sensor wiring harness clamp, secure the clamp to the fuel pipe mounting bolt, and tighten the clamp's mounting nut.

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JayceFitz

09/13/25 2:02am

As a car enthusiast, I've studied the working principle of sensors on the Focus, especially the oxygen sensor. It's installed on the exhaust pipe and contains a ceramic probe. When the oxygen content in the engine exhaust changes, the probe generates a voltage signal. This signal is sent to the vehicle's computer, which adjusts the fuel injection accordingly to ensure the proper air-fuel ratio for more efficient combustion. This helps save fuel, reduce emissions, and protect the engine. Modern Focus models may use wideband sensors, which respond faster and more accurately. If the sensor fails, the car may display a warning light or experience shaking, affecting the driving experience. Regular inspection of the sensor wiring and connections is crucial to prevent inaccurate signals caused by carbon buildup or damage.

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