Hi,

It's my first post and I need some help.

I have recently purchased second handed 2005 350z Anniversary VQ35DE.

The car has an aftermarket cold air intake and test pipe cats which i'm not sure of the brand. Intake has a shield around it separate it from the rest of the engine compartment.

The vehicle has been throwing OBDII code of 1146, 1147, 1283, all of which are related to either Air to Fuel ratio and O2 sensors after the cats both for bank 1 and 2.

O2 sensor errors probably seems like it's the after market cats but I am worried about the Fuel to Air ratio.

Does anyone else have the same problem or solution that they have been able to mitigate the problem?

Thanks in advance

How does the car run?

You may want to bring your car in and have it looked over

The car is running well.
Thank you, i will bring it in. I would like to research beforehand so that I wont waste money and time just to have them tell me that it's being caused by the aftermarket cats