98 Octane

Low voltage problem

AT in manual mode on 3rd gear from 2000 rpm with DTC full off. From 2000 rpm good acceleration, but while accelerating after 2400 rpm, it felt like the car had cut accelerating. After 6000 rpm I heard superknocks. Then I released the accelerator pedal and shifted into higher gears. Read the errors, and got the same errors: 1. DME shadow (inactive) codes: -30F0 - DME: Superknocking, cylinder 4; -30F1 - DME: Superknocking, cylinder 5; -30F2 - DME: Superknocking, cylinder 6.