STC light flashes when I turn...?

Dempsy · Post by **Dempsy** » 30 Dec 2012, 17:20

Last week my car stared to get the stc light flashing when I turned left and then I started to hear a ticking sound that accompanied the flashing light and now the light flashes when I turn both ways but the ticking sound only starts when I turn left. And all this happens only when I give it gas. I can coast and its ok. I took it in and the mechanic said it sounds like a bearing is going and getting sloppy so it sets off the stc sensor. It makes sense but I have never heard a bearing tick before. But cv joints tick when they start to go so I jacked it up and check the cv joint and there is no slop between the wheel and the joint..... So I don't know where to start. Both of these parts are easy to install BUT which one is it. I cant think of anything else that could make that sound and set off the flashing light. ABS module was replaced 4 months ago and it was an OEM part so thats out of the question.
Anybody know what this is??? been looking everywhere online with no luck.

thanks!!

Post by **Matty Moo** » 30 Dec 2012, 21:22

The ticking sound is probably the abs pump running when the stc kicks on. It's coming on because there's a call for it. I wouldnt go after the bearing itself, i would first check to make sure that the bolt holding the cv shaft is tight. Usually if it's that loose it will trip the abs light/message.

Dempsy · Post by **Dempsy** » 01 Jan 2013, 12:15

I checked the drive shaft bolt in the hub and its tight. SO I have no idea and I guess all I can do is start by replacing the bearing that my mechanic said to do and if its still there I will take it to him and tell him he was wrong and find a different mechanic. I hate when mechanics say "well, I would start by replacing", or "I've never seen this before". You would think a vovlo mechanic would have had this problem before. UGH.... frustrated!

Post by **JRL** » 01 Jan 2013, 14:58

Instead of spending time and money not knowing what the problem is, I suggest you bite the bullet, get the STORED codes read at a Volvo dealer (or a shop with VIDA).
A code will be there and it should point you towards the problem

Dempsy · Post by **Dempsy** » 01 Jan 2013, 15:45

They did hook it up and there were no codes.

Japedo · Post by **Japedo** » 01 Jan 2013, 19:54

Did u scan it with a generic obd2 unit? Or with vida/dice?

A generic scan tool wont pickup much.

Dempsy · Post by **Dempsy** » 02 Jan 2013, 00:43

They scanned it with Vida

Japedo · Post by **Japedo** » 02 Jan 2013, 05:52

I would remove and clean/ reinstall the abs sensors. Try and take a look at the grooves in the axels that the sensors use to gage wheel speed and sipinning tires. Its a long shot, ive maintained my own volvos for 10 years and have not encountered such a problem. Surprised their isnt any codes stored.

It sounds like a bad abs module. But like u said,its new. Hope u figure something out, sorry i dont have much usefull input tho. Seems strange

Dempsy · Post by **Dempsy** » 02 Jan 2013, 13:00

So I took both front sensors out and cleaned them but it still flashes and knocks when I turn. One of the sensors had wear marks in it like it is or was rubbing against something. Called the mechanic and he said it could have been from a bad bearing in the past but that wheel had no noise. SO i think we will hook vida up and read it while I drive and make a that noise and light act up. What a pain in the ass but I dont want the damn abs module to go since I just bought it and it cost a small fortune. So I am not replacing anything else till it gets read. Thanks guys and I will keep you posted since this has never been heard of.

BigSteve · Post by **BigSteve** » 26 Nov 2017, 09:51

This is caused by a loose ring at the end of axle shaft. Clean with wire brush. Glue ring with super glue. Reassemble. Or, replace axle.