Citroen C5 P0500 Vehicle speed signal fault : Value received incorrect

[northface]

Hi,

Got a P0500 Vehicle speed signal fault : Value received incorrect from Lexia. It sets the MIL light and gives a "Depollution system faulty" message.

What causes this? The speedometer works fine. Where does the ECU take this signal from? I can't find any sensor on the gearbox.

All info and ideas appreciated!

[myglaren]

IIRC it comes from the ABS circuit.
Välkommen

[northface]

OK. I've recently replaced a front wheel bearing. Maybe something went wrong there..

[myglaren]

Yes, possible damage to the ABS sensor or wiring or even (less probable) the reluctor ring.

[ell270390]

Agree with myglaren! Also when you fitted the wheel bearing did you fit it the correct way round with the magnetic pickup on the inside

[northface]

OK. I put the black side on the bearing facing inwards. (I hope..)

[ell270390]

Yeah black side is pickup hopefully you have put it the sensor side I'd re-check that's correct first! Unless obvious damage to speed sensor or wiring