Thread: I got some codes

Those don't look like complete codes. They're usually a letter (most often P), followed by four numbers. You only have three numbers. I'm going to assume you mistakenly omitted the first number which is sometimes zero.

P0101 - Mass air flow circuit, range or performance problem
P0107 - Manifold absolute pressure sensor circuit, low input
P0304 - Cylinder no. 4 misfire detected
P0121 - Throttle position sensor circuit, range or performance problem
P0401 - Exhaust gas recirculation, insufficient flow detected (could be related to the MAP sensor error)

That's most of the sensors your engine has. If they were all faulty, I don't see how it's running. You need to get them cleared and see what comes back. They take a while to clear themselves if the error goes away. Otherwise I think you have some chafed wires in the PCM harness or something.

Did you start the car with something unplugged?..... a bad sensor can cause codes in various places, what year is you car??