OBD II ba yang kotse mo? I have an OBD II scanner to read CEL and I live just near Munoz. OBD II has the connected usually under the driver dashboard (honda civic near the center, vios is in front of the drivers seat)

on capacitors, any repair shop can do it...don't notice one on roosevelt/frisco though. depends also on the function of the capacitor. it's just a minor soldering job I can even do it but buy the part yourself (in Munoz near Mercury there are electronics shops)

in raon, one of my favorite haunts, there are also many repair shops (i'm an ECE and electronics used to be my hobby)