What's the 7e8 engine code Volkswagen Jetta?

The code 7e8 in a Volkswagen Jetta means is a fuel intake code. This means that the knock sensor in Your vehicle has recognized that the engine rod rack is vibrating loosely, or rocking. Most of the time, this is not an actual problem with the rack, but rather the knock sensor has logic progRamming within the engine control module that should be redone or replaced.