Yes it is easy. Just put your key in the ignition and turn it to on then off rapidly three times. Then turn it back to on and watch your odometer on the instrument panel. Whatever error codes (P####) appear, write them down. Then you can search this forum (or Google) for the meaning of those codes.
To clear error codes, just undo the negative post on your battery for about 1 minute.
Either that, or go to your nearest parts store (NAPA, O'Reilly, Advance, Autozone) and have them use their code reader to do the same thing AND they can clear the codes too.