I have G35 6mt coupe. my traction control light is always on and traction control won't turn back on. the parking break light won't go off when the hand brake is down. does anyone have any pointers to what the problem may be I'm thinking damage sensor but was wondering if anyone has had any experience with this

 

Are your brakes worn out? How many MM are left on the pads?

 

they have a good bit of pad life left. do you think abs sensor could cause this??

 

I think there was something like 25 different DTC's that can trigger all the lights. Since the parking brake is obviously not working properly I'd start there, disassemble the console and find out why the switch won't disengage.

Check your brake fluid level, it's a common cause of these lights.

 

 

That's your air fuel sensors, the upstream ones. You definitely have a problem, start by checking for vacuum leaks.

 

 

Exhaust leaks can cause problems as well. Correct all obvious problems first, order new gaskets if the stock ones are trash, replace fasteners that are broken, torque to spec, done.

 

I got new vibrant ones. I think the problem is that I have AAM 3in dual exhaust and the flange is bigger than the stock ones so I might order another gasket and double them up

 

You shouldn't have to double up gaskets, I thought that exhaust was able to bolt directly to the stock cat or aftermarket 2.5" cat/test pipes. Exhaust leaks downstream from the cat shouldn't be an issue though, only leaks between the header and cat would affect.

I would start at the beginning of the intake tract, go over everything and look for leaks, clean the MAF, check the spark plugs and coil packs, check the PCV valves and hoses, fill brake fluid to the MAX line, inspect the A/F sensors (upstream) for damage, fix the parking brake switch, ECU/idle air reset, and then see if issues still persist.

 

 

 

I guarantee a good muffler shop will get it to stop leaking