checking possible error codes

[neobristol]

how do i check error codes on a vx v6? my management light came on for about 15 seconds the other day, i wonder if ive upset something as i replaced both knock sensors on saturday trying to cure another problem. Oh the car seems to misfire on idle when the engine is upto operating temp, and it seems to have abit of vibration when cruzing around 80k's, any idea's? this problem only happens on petrol on lpg it runs fine.

[sxc_sound]

im not 100% sure, but with the vt you can hold the "mode" and up arrow button and start the car, then pressing the mode button you can scroll through the extra options and i think its the one that displays "t-00" when there is no error

[ozengines]

Have a look here:
Checking error codes VT/VX

[neobristol]

had the ecu light come on again today for about 15 minutes whilst cruising at 100k's, checked for error codes but it says all is working as it should, anyone got any idea's?

[fitz_vt]

hitting mode and up goes into diagnostic and tune mode the T00 -- is actually the timing.
(got told my mate whos a holden service tech)