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ABS service required and STC service Required

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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ADriggs26
Posts: 17
Joined: Sun Jan 03, 2016 2:23 pm
Year and Model: 2001 s60
Location: St. Louis

ABS service required and STC service Required

Post by ADriggs26 »

I changed my struts yesterday on my 2001 s60 with 169,000. They were the original struts so they were kind of a pain in the butt. I put everything back together right and the car rides A LOT better. However, my ABS light and STC light are on. I also get a check engine light for a "vehicle speed sensor A." I tried to reset the car by unplugging the negative terminal but that did not work. I rechecked the ABS sensors and they look fine, as does the wiring. They aren't too tight are loose. I am clueless because I had no problems before this. The lights won't go away. Help please.

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Post by abscate »

It is really easy to break the ABS sensor wires by letting the caliper hang, even if the insulation looks good. The wires are thin gauge inside the sleeve.

You can check the resistance ( about 2k Ohm?) from up top if you find the ABS connector and confirm a bad wire.

New sensor or find break and solder wires.

There is some documentation in my 1999 maintenance log thread
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

ADriggs26
Posts: 17
Joined: Sun Jan 03, 2016 2:23 pm
Year and Model: 2001 s60
Location: St. Louis

Post by ADriggs26 »

So I've ordered a new sensor for the driver's side along with a speed sensor for the transmission. I was reading deep within posts on this site and found that the transmission one could be the problem. I'm going to try one first and see if it works and if not try the other. Hopefully I'll have an update in a couple days. Thanks.

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abscate
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Posts: 24542
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Year and Model: 99: V70s S70s,05 V70
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Post by abscate »

It could be the trans one but if you were working on the struts, Occams razor probably cut one of the wheel sensors, like I did.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

ADriggs26
Posts: 17
Joined: Sun Jan 03, 2016 2:23 pm
Year and Model: 2001 s60
Location: St. Louis

Post by ADriggs26 »

I ended up taking my car to the dealer and they said that my right ABS sensor was not tight. I don't know how it was loose but I remember making sure it was tightened and my brother saw me do it. Anyways, the lights are off and has been fine for the day. I'm keeping my fingers crossed. Thanks for the help!

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abscate
MVS Moderator
Posts: 24542
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99: V70s S70s,05 V70
Location: NYC, ALBANY NY
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Been thanked: 1418 times

Post by abscate »

They ground through the attach screw so if it gets loose you will get the ABS fault
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread

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