Speedo not working

[Carrera1]

Hi guys , my Speedo is not working and the engine management light is on .

fault code po 500. 
I had my mechanic check the wiring to the conversion chip , he says it is ok .

what would be my next move , replace the chip ?

not really sure where to go next , only £70 for new chip , im thinking its worth a punt .

Any ideas welcomed 👍🏻

[Wisey]

Hi, I had a similar problem and decided to remove the chip and reconnect the speedometer to read Kph. I used the power supply to the chip to wire in a USB socket into which I connected a digital GPS speedo, all from Amazon. See the pictures, it works very well and didn’t cost very much. 

[ALSALPHARD]

Hi, just a guess, I'm not a mechanic but might be an ABS wheel sensor not reading to the PCM

[Picasso]

i agree with alan on this abs sensor issue 

[Carrera1]

Thanks for the replies guys , I meant to add that the odometer is not registering miles either . Van is not being used at the moment so it’s not doing any miles anyway . It’s really frustrating when you use a code reader but it doesn’t actually tell you what the exact problem is!!😂

Which wheel is the speed sensor located on ?

[Carrera1]

Can I ask another question?

If the abs sensor had failed would it not bring up an ABS  fault on the dashboard ?