2 fault codes and hunting revs

I'm getting these 2 adult codes.



P0120- Throttle/pedal position sensor/switch "A" circuit



P0340- Camshaft position sensor "A" circuit (bank 1 or single sensor)



If anyone has any suggestions they will be appreciated.



Already replaced throttle position sensor with a second hand unit and cam position sensor with a second hand unit, both supplied my mg parts suppliers. Also replaced idle control valve and cleaned maf sensor.

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