Code P0430 - Aftermarket Exhaust

Quicksilvers

From the pics it looks like you have resonators I do not see any catalytic converters there. How did you past inspection or smog? The code P0430 should be a faulty camshaft position sensor. I had this same code on my 350Z and I had to replace the camshaft position sensor with a Denso brand sensor. Did the last owner install aftermarket camshafts? I have hear of faulty O2 sensors on these cars with or without a code being thrown. The only fuel you should be using in your 370Z is 91 octane gasoline or higher. Be careful using octane booster because curtain brands can damage catalytic converters and 02 sensors. Read the instructions before using any octane booster and make sure it says it is safe for catalytic converters and O2 sensors. A lot of brands of octane booster are for racing or off road use only.

fryzia23

P0430 is catalyst efficiency below threshold bank 2. You are confusing with p0340 which is related to camshaft position sensor.

btfrost20

Took it to a nearby exhaust shop and they told me there aren't any catalytic converters. The Nissan dealership did tests before selling the car to us(certified pre-owned) and everything came back good in terms of their emissions testing. Not sure what to do now, since it will likely not pass an annual emissions test in my county. Going to have to call up the dealership and see if they can fix things based on the warranties it came with.

Quicksilvers

Now is your chance to get test pipes with high flow catalytic converters. Aftermarket catalytic converters flow a lot better and your 370Z will make more power running high flow aftermarket catalytic converters vs. the stock Nissan catalytic converters. The stock Nissan catalytic converters are a restriction in exhaust flow on the 370Z. This code P0340 you got on your 370Z does differ from the code P0340 I got on my 350Z. Most of the time you will get the P0340 code on your 370Z if you either don't have catalytic converters or your catalytic converters failed and need to be replaced.

nis350

It is illegal for dealers to sell cars without catalytic converters. I would take it back and have them install them. You can always remove them afterward, but you will have them in the future for whatever reasons.