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VSS Fault

10K views 5 replies 4 participants last post by  JOHN HENSMAN 
#1 ·
Vss fault light flashes for 3 or 4 seconds only at startup. 2021 RS
 
#2 ·
Anytime you have an intermittent fault indication like that, you should check the battery, it's main cable connections and the charging voltage first before doing anything else.
VSS is "vehicle stability system", commonly called "the nanny".
It has several components and if that continues you probably need a dealer to connect their diagnostic computer to try and catch which part is going bad.

AND.....if it is still under factory warranty, you should NOT mess with it yourself, except maybe checking the battery stuff.
 
#6 ·
Check the relays in the boot - they tend to losen up with vibrate of the road. Clearance between the top of the relays and the cap is too great and the relays are not secure. Also, the male section of the relay that goes into the fuse box (female) misalign and not make contact; giving you warning lights that come on and off for not reason.
 
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