Ford Mondeo MK3 2.0 TDCi 2005 - IAT sensor - strange behavior

Hello
The car has recently encountered error P0110, the IAT sensor circuit (intake temperature). And I would not be surprised if the sensor was still -40 * C or other. The problem is the sensor is OK. Shows the correct values when stationary. After all, this is an ordinary NTC thermistor. So I replaced the sensor with a used one, and then the same.
So I checked the graph while driving. I saw something like this:

(the red graph is the temperature and the green graph is the voltage at the sensor output)
I checked all the cubes - from the sensor and the one next to the battery. I pierced with some contact, but still the same.
What could be causing this? I thought it was a cold February on PCM but somehow I doubt it. Anyone met with something like this?
Regards, Sebastian


PS Auto enters emergency mode while driving through these pins and has no power. You just need to turn the ignition switch off and on and it goes back as normal.
PS2 As if it had to do with EGR, I tried to blind it earlier, and it was the same.

Enter the engine designation. Possibly power.

The engine is 2.0 TDCi 130PS. FMBA engine designation

On the passenger side, under the hood, under the cup, you have a connector for the ECU, a 6mm wrench for one screw. Check if it's clean there. Then look for damage in the engine harness.

I know that already. I have access to TIS Ford so I've already detected it. This is called PCM, or Powerchain Control Module. In general, access is to d *** so to check the ankle I have to unscrew the shock absorber bracket (it's about the black plate). In a week I'll try to unscrew it. The beam was generally checked in addition to this section in the pit. I still have to check if there are any connections in the fuse box. I'll let you know in the week. I am waiting for some proposal.
Thanks in advance.

The only suggestion that comes to my mind is that you need to roll up your sleeves

There are just a few screws with this plate.

I understand that you have a wiring diagram and will be able to x-ray the wires?

I have diagrams. Rather, you can't go without it . I have all the TIS for this model, and there is everything. I have written what cable colors, plugs, bundles, PCM pinout etc.

@DTRQ - where is this IAT located? I just have one to replace and I do not know where to look for it in the car.

It looks like in the picture: Link

In front of the car, on the passenger side, on a metal pipe that connects the intercooler with the manifold. Screwed from the top with two Torx. It's best to pull out the entire tube.
Regards, DTRQ

I have a similar problem in the Ford Kuga Mk II, the sensor is good and it indicates -40. I have a question if it was possible to fix it and what it was

wieslaw13 wrote:

I have a similar problem in the Ford Kuga Mk II, the sensor is good and it indicates -40. I have a question if it was possible to fix it and what it was

Since it indicates -40 * C, it is probably not good, or the beam is damaged ... That's how it was fixed. The problem was poor contact at the PCM

The sensor was replaced, the indications are the same, the beam is overexposed in working order. After firing, the kuga enters the service mode, you have to turn it off and light it twice and it's fine for some time. It started a year ago in the summer, in winter there were no problems until May. Does anyone have any idea where to look for the fault