Last month I bought a 2010 Omega lf1 3.0l sidi. 139.000 KM lately I have been getting an intermittent 'Check Engine' fault and also a 'Stability Control' fault. The Stability Control' fault, however, is more frequent. It would usually come on if we started driving after'status check' was completed but the car not warmed up I'm not aware if its a bad thing to start driving the car before worming up the engine as I'm 1st time and may be last time Holden owner ?? Occasionally whilst stopped at lights the car will 'feel' like it drops a cylinder and the car sets up a wobble, but after 10 seconds or so seems to right itself. Sometimes we will know if the check stability control fault is about to come on as the car starts funny and wobbles around when starting from cold or at lights. there is codes in the system po171 po174 po151. some time as will reading about cyl misfire at cyl 1/3/5 as i do have scanner and can read the fault cods. I did change all oils (engine/transmutation/power steering/brake fluid) as will as all filters (air/oil/cabin) petrol can not rich as it is inside the tank but i did add all sys fule cleaner and lifter free anf engine oil flush before changing the engine oil and did change spark plugs correct type and cleaned MAF and all PVC hoses and i did bay 4 new o2 sensors and will change them all at the week end as fault po151 relate to o2 sensore circuit low voltage bank 2 sensor 1 less than 0.800. Problem is I only use 98. We hadn't been running E10 anyway and was usually running 98. We don't know what the previous owner used though. Quite possibly he ran any thing..I just dunno. I am hoping that this version of events is ringing a bell with someone that has had a similar problem and got it sorted. What should we be looking for? i notice from the posts that may be case o carbon buildup as this cars have history of it but in this stage how can that be solved? Much appreciate any assistance.