问：两天后洗涤发动机后，发动机灯亮了，然后熄灭了，油灯亮了3次 - 开车 - 熄灭了。

Well, you have a couple of questions here and not a lot to go on, so I’ll address them as best I can. Your Check Engine light indicates that a trouble code from a sensor has been registered in the engine’s computer. You’ll need to have a certified technician, like one from YourMechanic, connect a scanner/code reader to the car’s diagnostic connector to inspect what trouble codes have been stored. Trouble codes are a starting point for any technician; in most cases, simply replacing the sensor that sent the code will not remedy the problem and it’s necessary to "look past" the code to get to the root cause.

If your oil pressure lamp is coming on after washing the engine but you haven’t previously noticed problems like knocking or valve noise, or haven’t seen the oil lamp come on before, there’s a good chance that the engine wash caused a short in your oil pressure sending unit or its associated wiring or connectors.

至于吉普是否值得更多投资，凯利蓝皮书将'04吉普车自由的转售价值约为3500美元。您已经取代了许多零件，包括新变速箱，因此，如果车辆可靠且坚固，则可能值得持续一段时间。但是，如果您目前必须继续更换零件，则可能达到收益减少的点。

如果您需要帮助，请考虑您的机械，因为我们的一位移动技术人员可以万博体育入口diagnose your car’s Check Engine和油压灯亲身避免进行任何不必要的维修。祝你好运！