At WOT, around 3300 RPMs, if feels like a sudden cut-out of torque. My car still accelerates, but just not as hard as it should be. My SES light came on and I Had a body shop run a diagnostic test and P0420 code came up. Shop says it is o2 sensors, but the Jerry Rome Nissan service department says it may be the MAF or the computer.

The lady in serice said that computer can be reprogrammed under warranty ( I have 60k miles on my car) untl 70k miles. She also said the MAF can be replaced under the same warranty, but the 02 senors cannot be replaced under warranty. Anyone know if it should be? With TSB's maybe? This 70k warranty is because my max is a 2k Cali Spec. Thanks!