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Name That Part! Mystery Pug Plug

308 Views 4 Replies 4 Participants Last post by  Macron95
Hi all👋
Hoping someone can identify this electrical plug and its function on my 2003 Peugeot 307 2.0L petrol (RFN EW10J4 engine).
See attached pic for reference.
Looking from the front of the engine, it is just below and to the right of the throttle body, and it seems to be attached via a piece of solid plastic to the port that the vacuum pipe from the crankcase ventilation hose plugs into.
Doesn’t seem to be any kind of sensor in that area - unless it is built into the plastic port itself - and there is no mention of it in the Haynes manual.
Any ideas?
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Thanks all for the suggestions. The other side does have 2 pins in it drdino (see pic), but doesn’t seem like much room for anything else…🤔
The plug itself is labelled “Sicma”, which Google says is a Delphi type.
I took the throttle body off to get a better view. The only markings on the plastic (apart from the Peugeot and Citroen logos) turned out to be just identifying the type of plastic it’s made from🤦‍♂️
As you can see, the plastic port seems to be only connected (wrapped around?) the metal vacuum port tube for the PCV system. Not sure if it could affect or measure the throttle position from there?
Would it possibly be a heating element? I remember reading somewhere that some Peugeot throttle bodies are heated to stop them freezing up in winter, but this isn’t actually on the throttle body🤷‍♂️


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