Intermittant on my wifes 2004 Fabia 1.4. MIL comes on for a few days then goes off. Should i be thinking about replacing any parts ?

2 Faults Found:
17972 - Throttle Actuator (J338): Under-Voltage during Basic Setting
P1564 - 35-10 - - - Intermittent
17566 - Manifold Pressure Sensor (G71): Implausible Signal
P1158 - 35-10 - - - Intermittent
Readiness: 0000 0000

thanks