Do you know the functions of the sensors and solenoid valves on the excavator? For environmental protection, excavators are now mostly EFI vehicles. Diggers often encounter various alarm codes, and these alarms are mostly caused by sensor or solenoid valve failures. Here are the ten sensor and solenoid valve positions and functions on the engine.If you are looking for engine parts, pls visit our online website http://www.wonepart.com/product-list/engine, you could find many items, and if you could not find pls email us info@wonepart.com.