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MikeM173 M 2007 Solstice GXP, just over 4,000 miles. EBCM update has been completed. Service ESC and ESC Off show in DIC immediately upon startup. C0460 Steering Angle Sensor fault code. No other codes. From what I can see in the schematics, the yaw sensor speaks directly to the Steering Angle Sensor. There is only four wires from the yaw sensor (power, ground, and two data). The two data go directly to the Steering Angle Sensor. The steering angle sensor I am not sure how many wires go to it, so hopefully someone can chime in. Steering angle sensor does have two data that go to the EBCM. My guess is that the data sent to the EBCM includes logic from the yaw sensor and the steering angle sensor. Tech2 shows the steering angle sensor showing the degrees appropriately. Though that is not definitive that it is working properly. The issue I have is technically any of the yaw sensor, steering angle sensor and the EBCM could be faulty. It could be in the logic in the EBCM where it enters and it is registering it as the steering angle sensor. It could be the incoming signal from the yaw sensor, and since the system can't read the yaw sensor, only the steering angle sensor, it could be giving the code for the steering angle sensor. Or it could just be the steering angle sensor is faulty. I don't like that the schematic I have does not show how the tech2 would read the angles coming from the steering angle sensor though, so I do not know if there is another signal wire, or if it is a signal that is that is read through the EBCM. The schematics do not show enough about the EBCM to know if that is a possibility. I also haven't looked at how many wires are for the EBCM yet and verified what each do, so it is possible that it goes through that system as well. Does anyone have any knowledge of how these systems talk to each other on this level? #1 · Jun 21, 2021 2007 Solstice GXP, just over 4,000 miles. EBCM update has been completed. Service ESC and ESC Off show in DIC immediately upon startup. C0460 Steering Angle Sensor fault code. No other codes. From what I can see in the schematics, the yaw sensor speaks directly to the Steering Angle Sensor. There is only four wires from the yaw sensor (power, ground, and two data). The two data go directly to the Steering Angle Sensor. The steering angle sensor I am not sure how many wires go to it, so hopefully someone can chime in. Steering angle sensor does have two data that go to the EBCM. My guess is that the data sent to the EBCM includes logic from the yaw sensor and the steering angle sensor. Tech2 shows the steering angle sensor showing the degrees appropriately. Though that is not definitive that it is working properly. The issue I have is technically any of the yaw sensor, steering angle sensor and the EBCM could be faulty. It could be in the logic in the EBCM where it enters and it is registering it as the steering angle sensor. It could be the incoming signal from the yaw sensor, and since the system can't read the yaw sensor, only the steering angle sensor, it could be giving the code for the steering angle sensor. Or it could just be the steering angle sensor is faulty. I don't like that the schematic I have does not show how the tech2 would read the angles coming from the steering angle sensor though, so I do not know if there is another signal wire, or if it is a signal that is that is read through the EBCM. The schematics do not show enough about the EBCM to know if that is a possibility. I also haven't looked at how many wires are for the EBCM yet and verified what each do, so it is possible that it goes through that system as well. Does anyone have any knowledge of how these systems talk to each other on this level? See less See more Sort by Oldest first Oldest first Newest first Most reactions #2 · Jun 21, 2021 I have searched a bunch and did not see anyone replace an EBCM or Steering Angle Sensor for the most part. It does appear that the yaw sensor has been replaced a decent amount, which leads me to believe that could possibly be the issues. However, because of the simplistic design of the yaw sensor, it should only limit what issues arise from it. That means the Service ESC and ESC off should be a somewhat common problem associated to that. My guess is that other issues could possibly arise depending on if the yaw sensor is just not responding at all vs providing a faulty signal. That is a mere guess though, and I would still lean toward it causing almost the exact same issue, rather it would just be intermittent or all of the time. Intermittent I could see it possible causing other issues since it would most likely activate when another system is active (ABS or Traction Control) and it could possibly set those faults off as well. I would still lean away from that though. Anyone specifically have set issues associated to the yaw sensor? #3 · Jun 21, 2021 Have you tried to calibrate the sensor? Check the ground for the EBCM it is on the left side of the car ion the front of the engine bay on the frame rail. I attached the calibration instructions.

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• Steering Angle Sensor Calibration.pdf 72.5 KB Views: 234

#4 · Jun 21, 2021 also there is additional information on that DTC you gave it should be followed by an additional 2 characters. C0460 00: Steering Position Signal C0460 42: Steering Position Signal Initialization Not Accomplished C0460 4B: Steering Position Signal Calibration Not Accomplished C0460 5A: Steering Position Signal Not Plausible C0460 71: Steering Position Signal Internal Failure C0460 72: Steering Position Signal Rolling Count Invalid #5 · Jun 21, 2021 Calibrating it was my next step, so thank you for the directions. I figured it was explanatory, but that helped. For the five degree movement, does it show on the screen same as when you are checking it? Grounds are good, but per schematics it doesn’t appear those would affect the system with this specific problem. As for calibrating the steering angle sensor, would that cause an issue from startup? Just looking at the checks I imagine it is pretty close to on, and I feel like it would cause an issue driving as opposed to an issue from just startup. I’ll have to go check the code here shortly, but I believe it said “not plausible” Could be wrong on that though. #6 · Jun 21, 2021 The service manual specifically states to check the ground if you have that code. #7 · Jun 21, 2021 I checked the ground regardless to make sure it was good just to be safe. My comment was just my opinion based on my issue and the schematics. I need to get a manual still. #8 · Jun 21, 2021 Fixed. Uploaded the EBCM update again. Calibrated the steering position sensor. Clears codes. Cycled. #9 · Jun 22, 2021 awesome! Insert Quotes Post Reply

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