Citroen C5 automatic transmission fault

[Ben C5]

One fault message appeared while checking my Citroen C5 at a mechanic.
The fault is U1213 - Permanent fault - Vehicle speed information incorrect value received
The mechanic told me it's a sensor fault.
Can anyone let me know what is the part number of this sensor, where can I order it online?
It's for Citroen C5 2012 2.2 HDI

[Kees]

It's better to remove the error first and check if it stays off.
Sometimes it happens once, but it stays as long It's not cleared.

[Ben C5]

I have a problem with automatic transmission. If the fault is removed it still makes problem and comes back

[xantia_v6]

Is this a 4 speed or 6 speed automatic transmission? Do you know the transmission model number?

[Ben C5]

It's 6 speed.
I don't know the transmission model number, I don't know where to look for it.

[xantia_v6]

If it is a 6 speed then it will be what PSA call AM6 by Asin Warner. The same transmission was used by other manufacturers using different names such as TF80-T.
You should be able to find more information by searching with those model numbers.

[Kees]

I see at the picture, that this diagnose is not done with the diagbox.
Before you get a headache about this fault, try to find someone with a diagbox.

[Kees]

Here are the symptoms of this fault code from Citroën!
Also as you google on "Citroën error 1213" also point in the direction of an abs sensor.