I am driving a 2007 HR 350z. I currently installed a (Random Technology) High Flow Cat and installed 2 new 02 sensors. Everything were working well until I drove for around 50km. The engine light came on. So I thought I need to install an 02 extension, so it won't get too rich for the sensor. I reset the engine light, and it came up again after 30km. The engine code are P0430 and P2A00. Anyone know whats the problem? By the way, I didn't install any gasket attached to the header. Do you think this is the reason? THANKS

 

hr motors are going to get a CEL even if you have extensions for the o2 sensors.. just get used to the light lol

you may have a slight exhaust leak if you didn't put any gaskets between the cats and header flanges.. just buy some online i think berk technology might sell them

 

When the light is on.....will It change to safe mode and affect the performance of the car?

 

^^I never heard that before. If so, that is not good for me either, subscribed...

 

so thats mean the engine light will come up after I install a aftermarket downpipe?

 

I just had the P2A00... My ART pipes were all cracked up... You gotta get under the car and have a look at the exhaust near the headers. It's the first o2 sensor. Definitely a exhaust leak. As for the other one, I think thats a job for some stainless steel wool in the second 02 bungs.....

 

Thats what i am thinking about too, exhaust leak.........! But it is a tough time to uninstall the downpipe in order to put the gasket it.

 

It's not that difficult. You shoulda had gaskets in there already!!!!! LOL!