P1239 code help

Hey guys! I need some help. I have a stock 2009 370z that is throwing the P1239 code. The first time it happened I was driving on the highway at approx. 70 mph and then my car went into limp mode. I used the code reader and it threw a P1239 which indicates a fault or performance issue in the Throttle Position Sensor (TPS) circuit, specifically related to Bank 2. At this point I decided to replace both throttle bodies and I relearned the throttle bodies. I drove it around for about two weeks in town with no issue. I decided to try highway driving again, it worked for about an hour and a half and it threw the code again, resulting in limp mode. I have checked my fuses, relays, connections to the throttle bodies themselves and nothing seems to be wrong. I don't know what else it could be besides the accelerator pedal sensor going out. If anyone has any ideas I would be grateful. Thank you!