Ok i lowered my z a couple months ago, and had the slip, vdc, and abs lights on...went and had it aligned, which the rear is totally within spec, and the front is barely outta wack. Problem is that randomly the slip vdc and abs lights come on, i shut the car off at the next light or wherever i stop, fire it back up and immediately all of the lights come on bit this time the brake light is also on, and as soon as i take off, they all shut off. Ive had it checked for codes even when the lights are still on and nothing shows up. Sometimes they never come on, but they always come on if i hammer through the gears...and only randomly if im just cruising or taking it easy. Im wondering if it could be the abs sensors or the rear speed sensors. Any help? Oh, at the same time that i dropped it i also put on a nismo diff cover and ur crank pulley...stock size, and all diy. Help! Thanks

 

Did you check your brake fluid level? What about brake pads?

 

I did check the fluid which is fine and the pads were replaced when I bought it (6000 miles ago). I was super careful with the sensors, sooooooo...idunno
It does it even when I have vdc off too. Seems to have an attitude of its own...

 

That sounds like either sensor problems or ABS system problems.

 

From some threads I read through it seems like the front passenger sensor is a common problem, so Ill swap that one out and see what happens...lol I hate to just throw parts at it with hopes that it works tho...maybe Ill just have to get used to the christmas tree style dash.

 

ur brakes are running low....i had that happen to me numerous times...its just he car telling u that ur pads need to be changed....

 

Bank angle sensor could be off, thats a dealer reset. Clean the front wheel speed sensors. You may have a CAM sensor going out, people will say i'm crazy but i got some odd faults just like you discribe till it finally tripped my CEL. Last one, what tire sizes are you running?

 

245/285 35 19 tires. Never had any problems till I lowered it and put the diff cover on...wheels and tires have been on it for a while, thats why in thinking abs/speed sensors. Ill try cleaning them.

 

why dont you take it somewhere and get it checked out rather then making all these guesses? your in spring texas and J.Tran is literally a few minutes away from you.

 

Go up to a 255 front, your running the shorter than stock front tire and a taller than stock rear. VDC is on edge, also you stagger in width will easily cause the front to slide in corners causing a slip light.

 

Just an update...I'm an idiot LOL....My rear sensors in the pumpkin were not tightened all the way. I tightened the bolts, problem solved.

 

Mine randomly started doing this recently. Nothing has been changed on the car to cause this. Sometimes the lights will come on right away on start up, and sometimes they may not come on till 30 miles down the road.

Not sure what I need to do to fix it, but I would like to do it as soon as I can because I found out it's turning off my TC when the lights come on.

 

My titan did this....topped off brake fluid and it stopped. May be same for the Z

 

Just read you fixed it... Lol

 

Same happens to me I'm going to to check my brake fluid when I get home today ... Pads seemed a little low as well ill have to check them too

 

Similar problem, got all the lights a couple of times. Brake fluid is above min value, didn't check the pads.
But once when the lights came on the car started pulse braking the front left wheel when going about 60mph.
So I got the code read and it was C1115 ABS sensor abnormal signal. How do I know which sensor is it? Left or right?
Maintenace manual http://www.nicoclub.com/FSM/350Z/coupe/2007/brc.pdf (page 105) gives self-check instructions, but when it comes to checking sensor continuity (step #5, page 106) I don't understand which wires to measure and what values to look for?
Does the sensor fit both sides, can I swap them, see it come back again?