Speedo reading double

[msc59]

Hi all,

I'm hoping someone can give me some advice please. Since my ABS sensors failed on the front wheels, my speedo is reading double. I do 40mph its saying 80mph and my satnav is saying I'm 5 or 10 miles away from where I actually really are?? Anyone had this before or have a clue whats going on.

 

[jasonh]

I would say your new ABS sensors are faulty, or the wrong type, or possibly the reluctor ring is full of rust on one or two wheels.

Speed comes from the ABS sensors and the Sat Nav has a speed input too so that that it can estimate your location when the GPS signal is lost (e.g. in a long tunnel).

 

[TDE1again]

Speed comes from the ABS sensors

Well I never knew that! Mind boggled (as usual)