This sensor, it turned out, sometimes likes to act up. In general, if suspected, replace it. This is not a problematic area, just for information. But it's especially bad when it glitches in winter, and it's in winter that it gives slightly incorrect temperatures. Most likely, this concerns not so much the sensor itself, but the clogging of its surface from the coolant.
The sensor is located "in front of the driver", on the left side of the engine, i.e. (if looking from the car's cabin). It is secured with a clamp and leaks are not allowed due to the rubber ring. Basically, it is simply inserted into the hole, and the clamp prevents it from falling out.
Location of the coolant sensor in 1.5 dCi. In front of it is the mounting bracket for the coolant hose, as you can see I moved the hose aside, but the clamp still gets in the way. It is held by one 10mm bolt. Needs to be removed.
The clamp securing the sensor itself needs to be pulled toward you and slightly down, hooked with something, there is a gap of about 1mm, it comes out easily, but there is catastrophically little space there, there's nothing for thick hands to do there.
After pulling out the sensor, quickly plug the hole with something clean, the fluid will still leak out 150-250 milliliters. Then disconnect the wiring from the sensor.
the upstream oxygen sensor connector (8)
Unclip the downstream oxygen sensor connector (3)
Unclip the upstream oxygen sensor connector (1)
Approximate location of the sensor. position No. 1. in the general photo
2. - Hall sensor
It is located on the box, just under the outlet pipes of the small cooling circuit (well, there are tubes that go to the stove). Accordingly, for this reason direct access is not possible.
Fuel level sensor module: Removal Refitting Tighten the fuel level sensor module nut using the tool until the nut mark (10) corresponds with the fuel tank mark (11) .
the fuel level sensor module connector (2) ,
- the fuel pipe unions (3) from the fuel level sensor module
- the bolt of the particle filter pressure measurement
pipe (3) ,
- the particle filter pressure measurement pipe (4) ,
- the pressure sensor with its pipe.
Disconnect the particle filter pressure sensor connector (1) .
a Remove the particle filter pressure sensor nut (2) .