Hello! Pu Sang 5o code oil lamp is on sometimes, please check: 1. Is the oil short and needs to be added? Second, the oil bottom is sunken, which leads to insufficient oil suction space of the oil pump (a common problem in Pu Sang) and needs to be reshaped. Third, the oil suction screen of the oil pump is blocked and needs to be cleaned. Fourth, the oil sensor plug is damaged (a high-pressure sensor plug is on the filter base and a low-pressure sensor plug is behind the cylinder head). Fifth, the oil pump pressure is not enough and needs to be replaced. You can measure the oil pressure first and then determine the replacement! I hope I can help you! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.