Frist go to AutoZone and have them READ THE CODE and GET THE ACTUAL CODE NUMBER not their hairbrained assessment from the number.
Get the code number/s, they'll be Pxxxx numbers, then post them here to find out what the ECU is upset about. My thought is that the assclown at the garage unplugged something and forgot to reconnect it.
Until you tellus the codes we're totally clueless as to the cause for your CEL.
