Hey guys. I have a supercharged C5Z that gave me intermittent C1282 codes a long time ago. I'll be driving down the highway in a long sweeping turn, and it would randomly apply the front right brake for a second causing the car to dive to the shoulder of the road before the system faulted out and it said Service Stability Control System and the related could would be C1282. The 3rd time this happened, I pulled over and disconnected the steering position sensor and said the heck with it. This thing is going to cause a bad accident, and I didn't need any of the systems that badly. That was probably 8-10 years ago now.

I finally decided to get a yaw sensor and replace it, and took it for a test drive today. On a 30min drive, no codes ever popped up. I decided to roll into the throttle hard to see what would happen, and it violently cut the throttle after the rear end snapped a bit and then faulted out. So...the same issue is still happening and the yaw sensor did nothing. There is data that the sensor is receiving or something related to that Yaw Rate Bias system that's causing it to hook that front right brake before faulting.

I've scoured the net and the forums and have a ton of data on the Yaw Rate information, but not really sure where to begin. Any advice on where to start?

EDIT: Actually, I have a video of this happening. Just going straight down the dragstrip and it suddenly hooks the front right brake and you can see the car shimmy and I let off. Video:
This seems to be the table of events that must be happening for it to fault. Just not sure where how to dive into it, especially with something so intermittent.
Conditions for Setting the DTC
The EBCM performs 6 different tests to detect a DTC condition. The numbers below correspond to the numbers in Conditions for Running the DTC.

1. The yaw rate bias is greater than 7 degrees/second.
2. The yaw rate input change is greater than 390 degrees/second/second.
3. The yaw rate input voltage is less than 0.15 volts or greater than 4.85 volts for 1 second.
4. The yaw rate error is greater than 10 degrees/second 30 times within a drive cycle.
5. The yaw rate error is greater than 10 degrees/second for 5 seconds. Under this condition, this DTC will set along with DTC C1281.
6. The yaw rate error is greater than 10 degrees/second with the vehicle speed less than 60 km/h (37 mph) and the acceleration pedal is pressed more than 25 percent of the pedal travel range for 1 second during the VSES activation. Under this condition, this DTC will set along with DTC C1281.
Action Taken When the DTC Sets
The EBCM disables the VSES for the duration of the ignition cycle.

Thanks guys!

 

I had the same fault code. Did you check the connectors? MIne turned out to be the female pins has enlarged and did not make contact during violent maneuvers. I just serviced the pins (making it smaller to grip the male pins better) and the problem went away.
To quote Bill, our c5 electrical guru on the forum: our cars are getting old, check the connectors first before being a new part.

 

Yup, love Bill he's a personal friend.
I'm having the same code, where is this switch so I too can check the pin connectors?