Technical Maf air temp sensor tested ok. Still shows fault

[Gehngus]

Hi Guys.
My 2010 ducato has engine light. Error is MAF air temperature fault.
This is the MAF with in built air temp sensor.

I have tested all the wires which are fine 12v 5v Earth 12v

So I swapped the maf sensor for a used. When I first put the replacement in it was fine for 30secondss. Thenstopped working again.

In multiuescan i can see the reading does not change. There is no signal.
If i move wires etc no difference so no broken wires.

So I then bought a new sensor. Just in case.

still no change. Still no signal.

I have tested the maf sensors with multimeter and hair dryer and they all seem to be fine? As in when warm them up, the resistance drops.

What have I missed?

Is there anything else that would mess this signal up?

Many thanks

 

[transporter3]

bonjour,j'ai multiscan,il me semble qu'il te faut faire une reinitialisation avevc ton logiciel multiscan