What is the reason for the oil light in the Buick Excelle being on when there is no lack of oil?
1 Answers
Buick Excelle's oil light being on when there is no lack of oil is caused by false fault alerts, engine sludge, or oil pump failure. The specific reasons are as follows: False Fault Alerts: False fault alerts mainly refer to the failure of the oil pressure sensor—the oil pressure switch. This means the sensor originally used to detect the engine oil pressure itself malfunctions. If the oil pressure switch has an issue, the control unit cannot detect the pressure signal, causing the oil pressure warning light to turn on. Even if there is no lack of oil, the oil light will still remain on. Engine Sludge: Engine sludge can easily clog the oil pump filter screen (oil pickup tube) in the oil pan, leading to low oil pressure. It can also cause the oil to deteriorate or change viscosity. If the oil viscosity becomes too high, it can similarly trigger the oil light warning. Oil Pump Failure: Oil pump failure has a similar effect to clogged engine oil pickup tubes or oil filters, both resulting in low oil pressure and triggering the oil pressure warning light. The oil pump is generally driven by the camshaft's drive gear and is responsible for increasing oil pressure to ensure proper lubrication of all internal engine components.
