so found these other threads and theres 4 very common problems that cause this

1.) pcv hose has a crack in it , very common on vy series 1 and apparently rectified on series 2 , think i have a series 1
2.) old/Bad /worn 02 sensors
3.) E10 fuel/bad fuel - ran E10 for 2nd time in utes life last week
4.) exhaust mods - ive just had 100cpi cats put on

so i know ive got 3 and 4, now to figure out 1 and 2 get it fixed then clear code !!!

also read that the car idles rough and sounds bad at times this is exactly what mines doing !!! so off to check pcv hoses , oil level again , and 02 sensors, not that i know what im looking at lol