P102 Service Engine light warning came up.

MAP and O2 sensor are two separate items. MAP, reads manifold pressure, O2 reads exhaust content. O2 sensor often is a false reading not to be ignored but should not be immediately changed till other items are corrected. MAP sensor is often mounted on the firewall and can be identified as having an electrical connector and a vacuum hose attached to it. (ask a parts house to show you one and it will make finding it easier) Check for vacuum leaks in the hose and make sure the hose is well connected at both ends before changing the sensor. You may also want to clean the Mass Air Flow sensor located between the air duct hoses running from the air filter box to the throttle body. There are two small wires inside it that can be cleaned carefully with carb cleaner and a Q tip.If dirty, it can cause idle fluctuations or stalling.

I would get a professional to change the o2 sensor (oxygen sensor)