New Engine Problems

[cmx1204]

Hey guys, I finally got my car back with a new engine in it. However, the check engine light came on. Then went off for a couple of days, now it is back on. Whats the deal? Any ideas?????

[pdhaudio83]

bring to dealer....

[cmx1204]

well I had an appointment, but it went off the night before I took it in. I just wondered if it was something simple.
bring to dealer....

[pdhaudio83]

it could be, but with no code, it could literally be 1000 diff things