Gyrodec

Hi guys, Not sure if this is the right area to post in. Sorry if it's not. I unfortunately have the code of ECU death (p0605). Symptoms are, the car has a rough Idle and anything below 2k rpm on the road it will all of a sudden drop 200-400 rpm intermittently. Anyone have any thoughts on possible repairs before I go get a new ecu or the current one repaired. Fuses? PCR Valve? Cam Sensors etc? Thanks guys!