Need help! My abs, slip, brake, and vdc lights all come on after about 10- 20 seconds of driving. What could be causing these lights to come on? I’ve already checked all fluids, checked fuses, and changed out my rear speed sensors. Any ideas would be much Appreciated🙏🏼

 

Will it do this if you ONLY drive straight or does it happen as soon as you turn the steering wheel?

 

I haven’t really paid attention to that because I turn a little every time I get out of park. Doesn’t matter if I turn; when actually driving the car straight or turning, it’ll turn on. ONLY when actually driving the car tho; Lights won’t come on if I just turn it on and sit in park.

 

I would also like to add that my rear wheels are stocks, and my front wheels are after market (a little wider). I’m getting my rear wheels fixed so that why I have the stocks on in the rear. Would this be causing the issue in any way?

 

Exactly what tire size are you running front/rear. Wider doesn't matter but if the overall height is more than 3% that is a problem.

Test the driving straight in a big parking lot or a straight road, park in the road/lot, turn car off, open door, close door, turn car on, drive straight and see if it turns on if the car is driving straight. If it ONLY turns on while turning the steering wheel it could be the steering angle sensor out of calibration.

 

Just confirmed that the lights come on even when just driving straight, turning or not, they still come on.

 

Sounds like your tires are not the same size.

Put on all 4 stocks .

 

Yep, sounds like a > 3% tire size issue. Exactly what size tires do you have on each corner.

 

Also, just to verify, you have a RWD car right, not an AWD one?

 

Yes my car is RWD. They are 18” all around.
Front tires are 255/35 and the Rear tires are 225/50.

My new wheel comes in a few days, after it comes in they will all be the same. Just wanna know is this might be the reason for the lights. I would also like to add, before the abs, vdc, slip lights come on, my braking feels a little wierd like if the abs kicks is or something. But as soon as the lights come on, braking feels completely normal.

 

The 255s are 25" diameter.

The 225s are 26.9" diameter.

7.6% difference.

https://tiresize.com/calculator/

 

Ohh yeah that's definitely the issue, you're 7.6% different in size

 

Alright, thanks! I will stop worrying about it for now and wait until I get all my wheels the same and see if they stop coming on! 🙏🏼