ODB2 scanners are cheap, I just use my friends so its even cheaper.

On the newer cars their use is limited though. When the airbag light came on, on my Chevy last year it wouldn't pick it up. Needed some sort of GM specific scanner for that.

__________________
2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200