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Vehicle Dynamics Control System Warning Light

31K views 21 replies 10 participants last post by  YeuEmMaiMai  
#1 ·
The VDCS warning light as well as the parking brake light came on at the same time on my instrument panel. I read in another thread that it could be the 33 fuse, so I checked it this morning, and it is fine. My mechanic scanned the vehicle, and he got the C0071 code which translated from Spanish reads: "defective functioning of the sensor of the angle of the steering wheel". My mechanic said that I should buy a new sensor, but is that right? what are your thoughts? do you have any experience with this problem? My mechanic is not a Subaru specialist. Thanks.
 

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#2 ·
you just had some work done in the steering wheel right?

it's the roll connector or perhaps that xtra wire.....


hope someone responds that knows the details of the system.
 
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#3 ·
#4 ·
I believe there is a 'yaw' sensor or similar device in the center console area of some soobs. maybe the failure is in there?

can you post the actual code?

paging @plain OM
 
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#7 ·
Here is the message from the scanner. On another thread on this board from a few years back the poster said that there was no information on this code.
 

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#6 ·
In the other instance all the warning lights went off, and they installed a brand new part which functioned impeccably until the mechanic fixing the horn problem returned the car to me with the two warning lights. I will call the dealer to find out what part they repaired, because they gave me absolutely no paperwork after that job which was under warantee.
 
#8 ·
I'd guess the problem is still your clock spring (also known as a roll connector)

It takes steering input and feeds the VDC computer which is why the VDC light is on.

You can safely drive with that light on but one of the most powerful safety systems the car comes equipped with will be disabled. It prevents roll over and spinning situations in bad weather.

Why your brake light is also on I have no idea.

How is your horn working?
 
#9 ·
from some brief searching/reading, you may need a dealer to go thru an alignment procedure to clear that code. There's an issue with the range or the zero setting from the steering angle sensor. I suppose it is possible there's a wiring or connector issue but, the system is reporting an 'out of range' condition. may even require a dealer to use their SSM with a factory procedure.

I DO think you may be OK to ignore it but, having the CEL on 'masks' any future problem from warning you with CEL illumination.

I found one post that said that code can be triggered by a bad brake switch so....possible good lead to follow there.

I also found this;
C0071 has 19 detail codes that direct you to 4 different diagnostic procedures. You would be looking for C0071 followed by something like 2143H. You probably need to use an SMIII or some other high dollar scan tool to read that detail code.

When you have replaced the SAS have you had the thing zeroed? That will definitely screw you up - a new sensor must be calibrated and codes cleared.
 
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#11 ·
from some brief searching/reading, you may need a dealer to go thru an alignment procedure to clear that code. There's an issue with the range or the zero setting from the steering angle sensor. I suppose it is possible there's a wiring or connector issue but, the system is reporting an 'out of range' condition. may even require a dealer to use their SSM with a factory procedure.
I just spoke to the mechanic who initially and eventually repaired the horn problem with the car, and he agrees that it appears to be an alignment issue, because the lights came on when he reinstalled the steering wheel, and he is emphatic that nothing was broken.

I then called the dealer's mechanic who said that he has never encountered the problem before, and he doesn't know how to repair it. He was the mechanic in Viña del Mar, and there is one more dealer in Santiago where I could also take my car. I will call for an appointment, but it helps if I can be very precise. What does SSM stand for?

I DO think you may be OK to ignore it but, having the CEL on 'masks' any future problem from warning you with CEL illumination.
What is CEL? After all the problems I have had with this car, I want to sell it, but no one is going to want to buy it with a warning light that can't be repaired.

I found one post that said that code can be triggered by a bad brake switch so....possible good lead to follow there.
I spoke to the mechanic who fixed my car about this lead, and he is certain that nothing was broken.
 
#13 ·
There are two Subaru dealers in Chile. The one where I bought the car said that they had never encountered the issue before, and they don't know how to fix it. So this morning I went to Santiago, and they plugged what looked like a computer onto the car. I could see that they were turning the wheels. When he was done I asked to speak to the mechanic, and he said that his boss would speak to me.

His boss said that they couldn't align the wheels though they tried multiple times. That was true, I saw it. Then he said that the problem was the clock spring; so I replied:how can that be? they installed a new clockspring on Thursday; the horn didn't used to work, and now it works with the new clockspring. The problem with the lights on the dashboard started when they diagnosed the problem and took the steering wheel apart, before the horn issue was repaired.

There is a sequence to the problems: first the horn stopped working, and I took it to the mechanic to repair it. He told me it was the clock spring, and he returned the car to me with the two warning lights on the dashboard for the VDCS and the parking light. I bought the clock spring part, and when it was installed the horn worked, but the warning lights remained.

The boss of the mechanics replied that the sensor and the clockspring are tied together, which is true, and that the scanner used to diagnose the problem could say that the problem was the clockspring when it was the sensor all along, because they are two parts are intimately tied. (Explative deleted) He was trying to come up with an answer when I challenged his diagnosis. Maybe there is truth to what he said, but I don't trust the method he used to diagnose the problem, because it just came up from the top of his head.

Even though I have little confidence in the diagnosis, it is the only possible explanation given thus far. My mechanic which does not belong to the dealer said the problem was the sensor too. 1LuckyTexan said that it had to be the alignment that was triggering the warning light as well.

The sensor in Chile is US$895.08 installed. That's a lot of money for a 2012 car and a solution that might not even work. I checked EJC Performance, and they don't have the sensor, part #27549AL000, but they have one for the Legacy which costs US$120. Subaru in the US has the new part for US$284.62. Any new ideas before I order the part?
 
#14 ·
I am hesitant to believe in the diagnosis, because I have two lights on the instrument panel. The other light is for the parking brake, and the hand brake is working perfectly. Is it possible for the vehicle dynamics control sensor to work while the warning light is on if the mechanic at the dealership could not align the wheels this morning? What would cause the parking break warning light to turn on when there is no problem with the parking brake?
 
#15 ·
Today the shop manager at the dealer finally spoke to me, Mr. Daniel Pavez; I had to get the customer rep on his tail. He said that the VDCS works along with the brakes in stopping the vehicle in a skid. I said: the parking break is applied when the car is on a skid? He said: yes, and that is why the parking light went on at the same time as the VDCS warning light. This makes no sense to me, how about you?

Then he said that there is a coil in the sensor -- earlier I had been told that the coil was in the clock spring -- and when the mechanic uncoupled the sensor from the clockspring to check it -- and he put it back, he had to align it, and if he aligned it too harshly, he broke it.

I asked him if it was possible that it was improperly installed. He said it was possible, but unlikely because it has a tolerance of 10%, and the mechanic had tried multiple times to align it unsuccessfully.

Tomorrow the mechanic who supposedly broke it will reinstall the entire system. I don't think that he has insurance to cover the loss if he did cause it.
 
#22 ·
1. VDC does not use the parking brake, it individually modulates each caliper as needed.

2. Did you install LED brake lights? if so take them out and put regular bulbs back in.
 
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