Thanks, all relevant comments, NTK sensor, but I have used these myself on the 1.6 with good results, yes this code was previously set as we code read ther car right at the end of work as lamp was on, then cleared it then test drove it, the ntk sensor was fitted a week ago by another garage who according to the customer works on vauxhall as a sort of specialist.
Throttle body reset, a good point this proceedure failed to function on my solus, I forgot to mention that this happened, we did not have any chioce on engine code through the solus, so I did not find out what it was!
Thanks for all replies, must add I am not very up to speed on interpreting fuel trims, probarbly need to use them more!
Thanks for help so far, phrom fill