This morning my ABS, brake and traction light came on. I currently do not have a scanner for the car so I did the jumping of the pines on the OBD2 connector. I am getting code 33 and code 38 counting the ABS flashes. I am trying to verify if that is a rear wheel bearing speed sensor that I am looking at. This is a 2011 prius. Thank you.
The two digit codes are less definitive than the full DTCs. With those codes, it could be the speed sensor, or the brake booster/ABS assembly, or the booster pump. It might just be easier to get a mini-VCI (or, if you can swing it, Mongoose Pro 2) cable and Techstream on a Windows laptop to pull the complete codes. An ordinary scanner such as one from auto parts stores might not detect codes specific to the Prius, which is why Techstream is recommended.
I made a video on this and found a non Techstream dongle that works! Prius OBD2 Device, what you don't see with lower-priced devices.
Somehow, I just didn't see this thread back on March 20th. If I had seen it, I would have confirmed that blink code 33 corresponds to DTC C0210 and blink code 38 corresponds to C1238, and both of those codes pertain to the right-hand rear speed sensor. I'm sorry I didn't see it earlier, but that happens on forums sometimes. The best place to look for information like this is in the repair manual (see the wiki link below). Even though some of the options for accessing it may involve a small cost, it's always there and you know the answer will be in it, and that can be an advantage when you just want the answer without waiting to see who might or might not see your forum post. Toyota Service Information and Where To Find It | PriusChat The manual, of course, is also where you will find the most complete information on how to troubleshoot and resolve the issue being reported by the codes. While it's probably now too late to matter for the OP, the C0210 DTC can have seven different "INF codes" that give more detail about the exact issue being reported. Those, however, can't be got by the blink method; a scan tool is needed to get those. I do not know why Mr. F would say that. The blink codes reported by the OP are specific to the signal from the right rear speed sensor. (The booster assembly will always be on the list of suspects for such a code, just to cover the coin-lands-on-edge possibility that the fault is really in the ECU, which is in that assembly, but such cases are really rare. If that rare case did come up, having the full DTC wouldn't be any different. The booster pump is not implicated in any way with a wheel speed sensor code.)
You need to determine if it's the speed sensor (located in the bearing/hub), or the harness. It's USUALLY the sensor, which requires changing the complete bearing/hub (unlike the front), but the harness does go bad at times. When the left rear threw the code on my wife's Prius a few years ago, it was the harness, and not the sensor in the bearing/hub. Recently got the code for the right rear, and it ended up being BOTH. Water had seeped in to the connector and corroded the male pin on the bearing/hub and the female end of the harness connector. Both are easy swaps, with the harness a little more involved because you have to remove a few interior panels to get to the connection point on the inside of the wheel well.
