service engine light on 2000 Suzuki Grand Vitara

I repalced the catalytic converter and the sevice engine light sitll came on. What else is the problem?

2 answers
You should find this information very useful: http://repairpal.com/catalytic-converters-dont-usually-die-theyre-killed
Silly as it sounds, 8 time out of 10 it is the sencer that is bad not the part noted for replacement. Emissions syetem is the worst DGK Boise