once CEL lights up, the error code will still be there even if the CEL doesnt light up after u restart the engine....until u reset the ECU....best is to read the error code to identify the correct problem n way to solve it....
Guys..the auzzies have use the Apexi Power FC ecu in their Altezza and have kinda solved the low torque range issue that all altezza have. Go to this link and read about it...