What is this please

[ebt]

Can someone please tell me what this is please? It’s in the centre of the top of the dashboard.

Many thanks….

 

[Handy Andy]

Your AUTO ambient light sensor for nite-time illumination...

C1BZ-13A018-A - It's called a "Sunload Temperature Sensor"

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Works when the Light Switch is on AUTO (A)

is the AUTO setting
Not to be confused with FOG​

So you are aware - there are two types of "Sunload" sensors, one works with illumination and AC the other doesn't only does Illumination and does not affect AC. The one above is for NON-AC controlled vehicles.

How do you know?

You have two types of "Climate Controls" for the typical Fiesta -

and
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So when and if ever you need to get another Sensor - know the Climate control system too, for it "looks" at the Auto system for communications and setting of temperature. As to keep the interior at your set temperature as well as knowing how much light and heat there can be. This is done so it knows how to form a budget on engine loading and tries to adjust for the demands accordingly.

So the OTHER ONE is this...C1BZ-19E663-A

Same top dome shape as above, but has a LIGHT GREY body color
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It also has a lot more pretty little pins on the connector - and an index, to show that there is only one type of connector system it works with so it cannot be swapped in error with other systems. So if the connector index doesn't match the connector on the vehicle - it's not the right sensor - find the other type - listed above in this post.

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The big clue is the BODY of the sensors - the color is different between the two.

The Sun-load sensors wiring...Automatic Climate



For Manual Climate control - it's not present for Climate - and it also doesn't have EATC - so the "dome" button - simply goes to the Body control Module



So to help further this...more Manual Climate Control stuff...

Onto...that controller with the Big rotating knob on the front...


...This one shows how it affects the AC compressor ...

 

[ebt]

Thank you 🙏🏼

 

[ebt]

A few pics ….

 

[Handy Andy]

Wish you the best!

You will have a lot of fun in that car, feed it well and take care of it, so it can take care of you!

 

[ebt]

Thanks, it’s a 1.5 TDCI. My son, unknowingly just bought his wife an eco boost Fiesta ! I’ve talked to him about the absolute need for regular oil and filter changes !!!