Bosslady, I see that you and forklift_girl are both from Ontario. I may have worked on this very unit. Who is servicing your forklift now?

just how bossy are you?? the 02 code is a mast staging switch issue. check first for bent brackets then you can check the switches and sequence in the analyzer mode of the
on-board diagnostics. the proper sequence is for the switch on the carriage to protrude form the top of the inner rail then the rails begin to raise and the switch on the mast will become exposed. both of these are proximity switches that react to the presence of metal parts so a bent bracket or a build up of grease and metal shavings on the one in the carriage can cause this problem.