My 2013 G37 has been having loss of power issues. I will be driving and notice that I lose power. I will shut the car off for approx 30 seconds turn it on and its fine. I have replaced the MAFs, throttle bodys, downstream o2 sensors, and spark plugs. I took it to the dealership and they reprogrammed the ECU due to the TSB bulletin to no avail.

Has anyone else had this issue and what was the remedy?

Appreciate it

 

P010B is the drivers side MAF -Bank 2 -. the other code you listed, P010 seeems to be missing the last character which could be either a 1, 2, 3, B, C or D.

Regardless, when i was plagued by a simlar issue i found the wiring on the passenger MAF sensor - Bank 1 -was bad. I replaced hre connector with a pigtail and it has been fine ever since. Not saying this is what you have going on, but it is something to consider.
MAF related codes can be a pain. Recomend looking at the drivers side MAF wiring, jiggle it around and see if your conditon changes. Also buy an OBD reader and use Toruque Pro to monitor the airflow (gms/sec) and see if there is a split of if the airflow changes when you move the wires around.
Just some ideas from my MAF troubleshooting days.