A powertrain malfunction can be very serious and should never be taken lightly. Depending on the cause, a powertrain malfunction could lead to costly repairs, an inability to drive your vehicle, or even a crash. For example, if there is an issue with the transmission, it can cause jerking or slipping, which can lead to an accident. Additionally, components of the engine, such as the spark plugs and oxygen sensors, can affect fuel efficiency, leading to more frequent visits to the gas station and higher emissions levels. To avoid any issues due to a powertrain malfunction, it is important to have regular maintenance performed on your vehicle and address any potential issues as soon as possible.