Do I need sct tuner to read codes?

[j221282]

Ok so recently my check engine light came on, on my trilogy marauder , engine code reads “system lean bank two” but I’ve used a smoke machine and diagnosed the o2 sensors and there’s nothing to be wrong , the problem is I lost my sct tuner I used to tune my marauder , help?

[RubberCtyRauder]

No, there are multitude of code readers available.How do you know the code reads bank one lean condition if you don't have a code reader?

[decipha]

autozone reads codes for free but you can buy a generic obdii reader for $20 and download forscan to read codes yourself with your laptop if you'd like