I have a 03 350z performance with 67500. It started running like crap. has no power until around 3000rpms or little higher. once it hits 3000rpms it just takes off like normal. Strated doing this the other day then it stopped. couple of days before that it thru CEL 0057 but right after i plugged the code reader in it the CEL shut off. Now all of a sudden its running like crap again and has been most of the day and it finnaly thru Cel 0132, 0152.(02 sensor 1 on both banks 1 and 2 running rich). Not sure wat would cause this. The car has aftermarket down pipes which have been on the car before i got it and i've had it for about a yr now. Also custom axle back single exhaust.

 

car sat over night and now has no codes and runs fine. starting to think it was in like limp mode. would having having traction control on and sitting in snow spinning cause this. i no when traction control is on and the tires spin it blogs down the motor. im starting to think that might of put it into limp mode.