Engine error repair needed

[melvinx]

So i got this error today while i was installing some gauges,
I did start car on and off many times, maybe battery low ?
Maybe fuel ? since around here fuel is like 93
Sensor ?

Im not sure what it means, anyone has same problem and fixed it ?

What was the problem ?

[laphroaig007]

You need at least 95 RON / 85 MON gasoline for the GTI engine...