missing at idle and check engine light is on

HI next step would be to run cylinder compression test if all is within range you need to do a injector pulse test on each injector if all is flashing a noid lite then you will need to check coils as far as the computer not doing anything we just had one doing the same we started unplugging modules when abs module was unplugged communication was restored and we replaced shorted abs module now all is good Hope this helps