So tonight, I turned on the car. It was raining, and I got a "service stability system soon" message on the screen. I have had these in the past, and actually had had one the day before.
As soon as I start driving, I realize the car has almost no braking power at all. In fact, it's frightening. So I turn the car off and then back on at a light, and the brakes come back to full power - but now my trac control light on the dash is illuminated (off). So I drive on for a bit, then turn it off and on again, and voila, everything is perfect.
Does anyone know what could be causing the brake issue? Not the first time the car has had limited stopping power in the rain.
This is a complete shot in the dark, but it's possible that the brake booster hose is collapsing under pressure, and you're losing power assist. I've had this happen to me on other, lesser (read: less complicated) vehicles, it's plausible that you could have a similar condition?
My steering position sensor was bad and I know twice it made my brakes feel like mush, all the way to the floor, it would also kick my cruise off on flat level road at random andn apply one front brake. Scary stuff.
The brakes don't feel like mush - but it does feel like a total lack of power assist. I've done some reading on the other service stability system threads and I can't find anything that matches my issues so far - no one else is reporting the braking problem, and I don't have any wheel jerking or random stability engagement.
The Service Stability System condition is most often remedied by replacing one of the three sensors (steering, wheel, or yaw) but, the troubleshooting literature indicates that intermittent conditions are usually from problems with wiring, connectors, or grounds assoicated with the system. Since wet conditions are also related to your problem, I suspect some sort of water intrusion into one or more connectors.
If it were mine, I would check the level of brake fluid (also mentioned in the trouble shooting charts) and the connections and grounds I could find readily. Beyond that, I would take to the dealer or other shop that has the scan tools required to trouble shoot the system. I personally, don't like to take chances with anything that shuts down either the steering or brakes on the car.
I've had the "service stability system" light illuminate several times, and I often have poor wet braking. the two events have never occurred around the same time, though. Dealer hasn't found anything.
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