I fire up without a problem, but after a longer route of about 15 minutes, when the temperature is about 85 degrees, the temperature indicator reaches the maximum, and then the fan turns on, then the pointer drops, then the indicator goes to the maximum again, etc. Could this mean damage to the...

Yes, it will be a damaged sensor, but the preview of the actual parameters or even the measurement of the resistance of this sensor will confirm it.

Ok. But is it an engine temperature sensor or a coolant temperature sensor? But when the mechanic checks me, I will be 100% sure?

The defect is as old as the Peugeot 206, it is surprising that so many readers do not know the correct answer, and it is - a damaged relay (more often green) of the first gear of the radiator fan.

Yes, it's a coolant temperature sensor, not a first gear radiator fan. The entire repair took several minutes, the problem was solved.

Peugeot 206 2.0 HDI Engine - Fluctuating Temperature Gauge and Fan Activation Issues

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#1 17145108 02 Apr 2018 21:26

korndddd korndddd

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Post #1
17145108 02 Apr 2018 21:26

I fire up without a problem, but after a longer route of about 15 minutes, when the temperature is about 85 degrees, the temperature indicator reaches the maximum, and then the fan turns on, then the pointer drops, then the indicator goes to the maximum again, etc.
Could this mean damage to the engine temperature sensor? 2.0 HDI engine
It looks more or less like here
https://www.youtube.com/watch?v=Mo6wJYejW4I
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#2 17145123 02 Apr 2018 21:30

piotrekwoj1 piotrekwoj1

Level 42

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Post #2
17145123 02 Apr 2018 21:30

Yes, it will be a damaged sensor, but the preview of the actual parameters or even the measurement of the resistance of this sensor will confirm it.
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#3 17145133 02 Apr 2018 21:34

korndddd korndddd

Level 8

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Post #3
17145133 02 Apr 2018 21:34

Ok. But is it an engine temperature sensor or a coolant temperature sensor? But when the mechanic checks me, I will be 100% sure?
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#4 17145316 02 Apr 2018 22:44

piotrekwoj1 piotrekwoj1

Level 42

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Post #4
17145316 02 Apr 2018 22:44

Fluid temperature sensor.
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#5 17145371 02 Apr 2018 23:08

Aleksander_01 Aleksander_01

Level 43

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Post #5
17145371 02 Apr 2018 23:08

The defect is as old as the Peugeot 206, it is surprising that so many readers do not know the correct answer, and it is - a damaged relay (more often green) of the first gear of the radiator fan.
#6 17218321 13 May 2018 12:16

korndddd korndddd

Level 8

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Post #6
17218321 13 May 2018 12:16

piotrekwoj1 wrote:
Fluid temperature sensor.
Yes, it's a coolant temperature sensor, not a first gear radiator fan. The entire repair took several minutes, the problem was solved.
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