Toyota Highlander energy loss issue, speed drops from 60 to 30 on Toyota Highlander

Some Toyota Highlander owners report experiencing significant energy loss issues, where the vehicle's speed drops dramatically from 60 to 30 mph. This problem may stem from excessive engine oil consumption, particularly in models with the 3.5L V6 engine, which can lead to performance declines. Additionally, if the reduced engine power light is illuminated, it could indicate stored diagnostic trouble codes in the OBD II system that require attention. Furthermore, electrical problems, such as loose or corroded ground cables, defective ignition relays, or poor battery terminal connections, can also contribute to the loss of energy and speed. Owners experiencing these issues are advised to consult a qualified mechanic for a thorough inspection and resolution to ensure safe and efficient driving.