According to the problem of the car engine P1877 Code, the problem of the car engine may trigger from refrigerant. It is important to solve the car engine. This could be a reason what started by a leak in your scheme somewhere, which will have to be secure before replenishing the refrigerant. If you are car-savvy and you own a set of air training gauges, replenishing the refrigerant is frequently relaxed to do yourself. If you do not know the cause and you are not perfect to solve the car engine problem, you should not try to solve the car engine.