symatt

My abs and slip lights come on when I am braking at low speeds and it doesn't come on instantly some times. I can drive on the freeway at 80+ and it doesnt come on. I have a 2011 g37 sedan rwd and the tires are staggered but im pretty sure that's fine. I have topped off brake fluid and changed brake pads already and this problem still occurs. Any ideas before i take it to the dealership?

symatt

user 3587587

Could be a wheel speed sensor. If you have one use an obd scanner to find out what's up, if you don't you can get one for pretty cheap from amazon.

symatt

I was planning on getting a obd scanner but then i read somewhere that i would need the specialty tool to read abs codes

qmantran

Make sure your tire pressure at all 4 corners are equal.

what are your tire sizes?

SonicVQ

OBD Fusion with the $15 add-on for Enhanced diagnostics will do the trick:

symatt

slartibartfast

iTrader: (7)

The ECU stores OE tire diameter and rumor has it that changes greater than 3% will trigger warnings. You're at -4.1% and -3.1 % F/R.

symatt

slartibartfast

iTrader: (7)

It's not just width or stagger, you have to figure the appropriate aspect ratio to keep overall diameter within 3% of the OE number.

Stock front is 225/50-18, rear is 245/45-18 giving overall diameters of 26.68 & 26.86 inches, respectively. Your diameters are 25.75 & 26.03 inches, respectively. Appropriate 19" tire specs are 245/40-19 and 285/35-19 to stay within 0.5% of OE diameter. 275/35-19 also works for the rear and is a more common size.

There are numerous tire calculators on the web.

symatt

So I put my stock wheels back on and the lights still come on. But the thing is that those light originally came on after a day of driving with my new wheels.

symatt

So i bought a wifi obd reader and obd fusion plus the add on and I can literally scan everything except the abs lmao fml... but I did scan the general stuff and i came up with these codes and looks like some has to do with the abs but i really dont know what they mean

slartibartfast

iTrader: (7)

If you can clear the codes, do that and see if they return.

symatt

yea already did that :/ i mean it doesnt come on right when i start my car, i would have to usually backout of my parking or driveway first.

slartibartfast

iTrader: (7)