They will tell you what code is. Wore them out when i had volvo with isx. Webyour fault is for the vgt function of the turbo. It means that the actuator can not move the turbo and that there is a mechanical failure. This can be either an issue with the turbo. Webjul 5, 2019 · your fault is for the vgt function of the turbo. It means that the actuator can not move the turbo that there is a mechanical failure. This can be either an issue with. Webftb…