ABS comes on in a turn, why?

[turok]

Why is my ABS turning on in a turn? I am not touching the brakes, just coasting. But when I am on the gas, it seems to be okay.

It's unnerving taking the same turn and have 2 different things happens, not knowing which one is going to happen.

I had a flat, rear right.

Only changed the rear tires, mechanics and I agreed still 50percent left on the front.

ContiSuperSport2 fronts, new Hankook V12 rear. 295/30/18

First time the ABS came on was when I got the flat, left hand turn. I was on the gas.

After I changed the rear tires, the ABS would come on when left hand turns, coasting, 45mph, slight downhill, not touching the brakes.

Second time was slight down hill, with an bump in the middle, left hand turn, after I hit the bump, coasting, not touching the brakes.

any help/advise would be appreicated.

thx

ed

[Loren]

:welcome:

I will assume you have driven for a few days and the light does not go out on it's own?

Since you had a flat on the right rear the right rear sensor should be inspected and tested.

[judgejon]

Why is my ABS turning on in a turn? I am not touching the brakes, just coasting. But when I am on the gas, it seems to be okay.

It's unnerving taking the same turn and have 2 different things happens, not knowing which one is going to happen.

I had a flat, rear right.

Only changed the rear tires, mechanics and I agreed still 50percent left on the front.

ContiSuperSport2 fronts, new Hankook V12 rear. 295/30/18

First time the ABS came on was when I got the flat, left hand turn. I was on the gas.

After I changed the rear tires, the ABS would come on

when left hand turns, coasting, 45mph, slight downhill, not touching the brakes.

Second time was slight down hill, with an bump in the middle, left hand turn, after I hit the bump, coasting, not touching the brakes.

any help/advise would be appreicated.

thx

ed

Problem is unmatched tires.

You must use same make front and rear.

You can't mix tires. Different compounds, grip, will trigger abs action.

Choose one brand, period.

You can replace 2 fronts or 2 rears at one time, if make matches all around, front and rear

[logray]

I agree with judgejon if you drive a C4, from what I've read - and specifically this problem too. Perhaps check tire pressures - maybe they can cause strangeness with the ABS system in a C4.

If you have a C2 it shouldn't matter as much, as I've run different tires front/back without this problem and would agree to have a look at the ABS sensors (or check he sensors either way).

Edited September 5, 2011 by logray

[turok]

I put on my set of matching snow tires, snowsports, and took my car out.

It seemed to have worked. I drove the curve twice.

I have to build up my confidence to take it faster and faster.

thanks everyone

ed

[shark715]

Has the exact same issue with my C4S with the same two sets of tires, and once I put matching Hankooks on the front axle, the problem went away.