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Why does the EA888 engine oil pressure switch function fail?

1 Answers

LaErin

07/30/25 7:34am

Reasons for the failure of the EA888 engine oil pressure switch function: It may be due to poor contact switch operation or grounding of the wiring harness. Symptoms of the fault: After the engine starts and the oil pressure reaches the specified value, the indicator light remains on. Solution: Promptly visit a repair shop for servicing to avoid affecting driving safety. The following is relevant information: 1. The engine oil pressure switch is used to detect whether there is oil pressure in the engine. It consists of a diaphragm, spring, and contacts. The oil pressure indicator light is installed in the combination instrument panel, and the pressure switch is installed on the engine's lubrication circuit. 2. Inside the pressure switch, there is a diaphragm that moves under oil pressure and contacts that operate under oil pressure. When the oil pressure is below the specified value, the diaphragm does not have the force to push the spring, the contacts close, and the indicator light turns on. When the oil pressure is above the specified value, the diaphragm pushes the spring, the contacts separate, and the indicator light turns off, indicating to the driver that the oil pressure has reached the specified value. Under normal conditions, the contact operating pressure ranges between 30~50 kPa.

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