The 2005 Ford Escape Hybrid is basically an electric car with a gasoline engine back up. This car is powered by Ford Duratec 2.3L 4-cylinder gasoline engine matched up with a 70KW (equivalent to 94hp) permanent magnet traction motor. The Ford Escape hybrid uses a serial interlock type system. In this system, each cable/wire that carries high voltage has an interlock circuit that reports the status to the battery pack controller via two discrete (dedicated) wires.