Electric and Engine Management Fault

[Storm_Force]

Engine management and electrical fault light lit up today on the dash. Thought wtf then the dam thing won't go over 3k very frustrating, . Anyway restarted and it cleared though within a few minutes the problem comes back again.

Got it booked in for Tuesday, anyone know what the problem is likely to be?

 

[16v_jon]

ill put a a tenner on the throttle body unit , its cured by cleaning it out with carb cleaner happens to mine all the time, it happens because the oil breather vents into the elbow just before the throttle body