Speedo Issue

[DaveGT]

Hi guys. I've recently got a b5 A4 2.5 TDi with the AFB V6 engine and 6-speed box. It's front wheel drive if that makes any difference. I've got an issue with the speedo whereby it intermittently stops working. Needle just dies back to 0 regardless of how fast I'm travelling. Only ever lasts a few seconds and then jumps back into life and works as it should. Has anyone come across this problem before or know where to start looking?
Thanks in advance
Dave

 

[Chillout]

Hi it could be an instrument issue or the road speed sensor I would say the best bet would be to get a scan done to point you in the right direction.

 

[DaveGT]

I scanned it myself and it didn't throw any faults up

 

[aragorn]

might be worth checking the plugs/wiring to the speed sensor on the gearbox? Then replacing the sensor if that doesnt show up anything?

 

[Chillout]

Depending what diagnostic set up you used it might be worthwhile graphing the sensor for loss of signal

 

[DaveGT]

Thanks guys. At least I know where to start now

 

[@udi A3]

Also the earthing points on the chassis for the speed senser and cluster curcuit, my a3 did the same and it was bad earths, usually previously i would condem the cluster!

 

[DaveGT]

Thanks mate