I recently developed a problem with my car, ABS/Traction control service came up on my DIC, I hooked up a scanner and it had a C0169 code, the code was not clearing, I tried to clear the code but it was unable to clear, so I changed the Yaw Sensor, after changing the sensor, the code takes about 5 mins to come back up.
Now to be clear, its coming up while the car is running for a few minutes but without even driving, the code can clear with the scanner but after about 5 mins it comes right back up, before changing the Yaw Sensor the code was unable to clear.
Now it says Yaw Sensor Circuit Malfunction.
I am asking for some advice on anyone who had this experience and what was done to resolve the issue.

 

Just some info for the readers, although I never got any input on this issue, I eventually found the problem and to me, it was very surprising.

Ok the problem was the ABS module/pump, recently I washed the front of my engine from some power steering oil that was leaked maybe from the reservoir tank hose, the ABS pump got condensation into the unit and causing the mother board to get damp, after doing some diagnostic work I found that the ABS module was suppose to brake down 12 volts to 5 volts and send that 5 volts signal to the YAW sensor, after checking the wiring diagram and checking the module output, I realized the ABS module was not sending the signal, so I pulled the pump and found the problem into the pump.(Condensation on board)
The dealer sells the module in different pieces and the portion with the mother board was $1100.00, (Ebay has the complete unit used or rebuilt for plenty less, in some cases, they are even $200.00 complete) no pump solenoids included lucky for me I had two ABS pumps at home but the numbers were all different from my original unit.
The good thing is the units from 2005-2010 were all the same (according to the dealer) but will need to relearn the new vin, a good scan tool is require to do this procedure, my friend had a very good tool so he came over and did it, also you will need the same tool to bleed the system which he did.
I was able to clear the codes and now its working fine without any issues, I am only giving these details so if anyone do have an issue like this, at least they will have an idea how to go about handling the problem, and if only I knew the unit was going to get condensation, I would have taken my car for a drive after cleaning it, live and learn everyday.

 

Thanks for the follow-up.

 

Good job and thanks for sharing!

 

That really is a great follow up post! A few questions:

-when you first got the code and checked the diagnostics, did you work down through the various things that could be causing it besides the yaw sensor/control? I assume you did because in your follow up post it was the ABS module pump.

-from what you said, it appears washing the fluid off the area of the ABS module pump caused some water to get in, and condensation to happen.

-was the pump damaged already, or is it not normally sealed? and, without being critical of you, did you use just a garden hose to wash the fluid off, or a high pressure water hose? in other words, would this still happen with only a garden hose, or is it a note to all that high pressure may have been the cause? (or that the ABS module was already compromised/damaged, so any water would have done it in)

I'm glad you got it fixed!

 

First I was very surprised when I diagnosed it was the ABS pump because as I mentioned before, my car only has 5k miles.
Anyhow I washed the front of my motor because I removed my radiator to install a Dewitt radiator and in the process I noticed the front of my motor (aluminum) not looking as clean as it should so I decided to use some aluminum cleaner, sprayed the cleaner around the front of the motor and the cross member and then used a pressure washer to wash the aluminum, the pump is sealed properly but because I didn't drove the car after and left it sitting, the condensation happened, which I believed because I am not into the science part of it.
After getting service ABS, service Traction Control on my DIC and the ABS & Traction Control lights was on, also the ON/OFF switch was not working I decided to start looking into the problem, I checked and even changed all my wheel sensors, (expensive hubs because I have DDS Axles) after changing all the wheel sensors the problem continue to exist, I asked some advice because the new code was YAW sensor circuit, I bought a new YAW sensor and changed that also, code continue to exist so I called in my friend with his badass scan tool, he started from checking the 4 wires from the YAW sensor, he also had the wiring diagram, he then realized one of the wire gets a 5 volts reference from the ABS Pump and the 5 volts was not there, since the 5 volts was not there the code was not getting cleared, he then showed me he can take 5 volts from another source to get the code cleared but was only done to prove to me its the ABS Module which has a regulator into it to break down the 12 volts into 5 volts.
After removing the Module, my technician also capable of rebuilding the mother board in the pump, so he opened the pump and removed the first mother board, there are two boards into the pump, the procedure to remove the board is a difficult procedure , after removing the first board he showed me how wet the second board was, he said he can clean it up and get it functioning but I decided I wanted to change it, never know when another problem might occur because it was wet, after hearing the price of a new pump I knew I had 2 pumps somewhere in my garage so I searched for about 2 hours and found it, the part numbers were different and had my worried, so I went back to the dealer with both pumps and only then they told me there was no difference with the pumps, it just has to be reprogram to the new vin through a scan tool and also will have to be bleed through the said scan tool.
Now I can advice that if an issue was to occur like that with anyone, first check the 4 wires with a wiring diagram at the YAW sensor which is located under the stereo, you don't have to remove the stereo, just remove the center console around the radio, its a flat black sensor bolted with two 10mm bolts which can be remove with a 10mm socket and a small extension or a long socket.

 

Thank you for the further explanation. I really think the work you did will help others in the future who do a search on CF to find out what's happening when a yaw sensor alert comes up.