Hello guys i have a volvo 850 t5 i have work on it for almost 3 years fixing all the problems with my car but now i have a problem and i dont know how to fix it or what to do the speedo doesnt work i start the car and works fine but after my first stop it doesnt work no more but if i am driving and i put the car in neutral turn it off and back on works fine until i stop again i check and clean the sensors on the hub but its still doing the same. I need help please

 

does the odometer stop as well or just the speedo needle? Any other symptoms - upshift arrow flashing/ABS brake light come on off? Did you check for any codes? (you didn't mention which year but if its a 94/95, check out volvotips.com on how to use the LED button/jumper to read out codes from the ABS/Transmission computer... My sense is it could be the speed sensor connecting into the transmission (I'm guessing the wheel sensors would likely set off the ABS light)... Otherwise it could be the gauge cluster. Good news there is you can buy a used cluster and they just swap in...

 

The volvo its a 96 and its just the spedo that goes out the rpms work normal and no arrow light blinking actualy it went away 2 days ago it does not turn on the arrow no more and the confort or sport mode light went off too the abs light its on but i thing its because its getting air in the sistem cause the pasenguer rear tire brakes before than the rest and it wears the pad first i blead the lines but still does the same

 

ABS module. Mine does same thing

 

So the abs module its connect to the transmision? Or how does the speedo its doing that? I mean i understand the problem with the pad on right rear will have to do with the abs light on but the arrow went off and its not going on again 🤔

 

My 96 850r always has abs light on. No tranny arrow though. Speedo cuts out every time i drive. I replaced My passenger rear caliper 4 times in 2 years. They seize up. Dont know how that has anything to do with it

 

there are speed sensors at each wheel and one for the transmission. If you replaced the calipers, there's always the chance that the wheel sensor got knicked or got grease on it. The sensors feed into the ABS controller thus the ABS light will come on if the computer senses a fault. You can have the ECU and TCU scanned for fault codes - including codes to indicate whether a wheel or transmission sensor has a problem.

Check if volvotips.com has a diagnostic procedure posted.