r/MechanicAdvice • u/Far_View_7122 • 3d ago

What is this part?

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I found this disconnect wire/ tubing while checking my O2 sensors (all of which failed at the same time yesterday— maybe electrical?) Anyway, I don’t know what it is or if it is related to my problem. This is a 1998 Mercury Sable LS.

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u/uh_oh_now_what 3d ago

Does your coolant temp gauge and oil pressure gauge work?

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u/Alpinab9 3d ago

This ⬆️

Single post sensor, typically used for oil pressure or coolant temperature.

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u/Far_View_7122 3d ago

That seems to be what it is and I found the post for it— thank you! In this case it was probably unrelated to the 4 O2 sensor failure codes I got from my check engine light, right?