Open Road

Found my pesky coolant leak after pressuring system yesterday.
The housing on the coolant pressure sensor was leaking.
I have a distant memory of this being a redundant sensor in the coolant level logic system.
Meaning the level sensor will still trigger CWS and I can delete this piece of plastic and throw it away?
Can someone confirm this for me ?
Thank you.

Confirmed: delete. There’s a Porsche part for that. Really. But it isn’t as good as a brass double-ended barbed splicer that you can get at the hardware store even though it is dimensionally exactly the same.

Thank you sir.

I wouldn't call it redundant, perhaps overkill. The idea is that if your coolant level is low and the warning is activated it could go off when the temperature rises and the coolant expands and the level sensor sees a higher level. With the pressure sensor telling the warning system that you now have a higher level, but due to a higher pressure, the system will keep the warning on. Then, when you take the cap off to top up the coolant, it will register the drop in pressure and reset the warning.
If you take notice of a low coolant warning, and don't forget about it, yes, delete the sensor. If you are likely to forget to top up because the light went out, replace it.

smiffypr wrote: ↑Wed Sep 25, 2024 8:16 pm I wouldn't call it redundant, perhaps overkill. The idea is that if your coolant level is low and the warning is activated it could go off when the temperature rises and the coolant expands and the level sensor sees a higher level. With the pressure sensor telling the warning system that you now have a higher level, but due to a higher pressure, the system will keep the warning on. Then, when you take the cap off to top up the coolant, it will register the drop in pressure and reset the warning.
If you take notice of a low coolant warning, and don't forget about it, yes, delete the sensor. If you are likely to forget to top up because the light went out, replace it.

In practical terms the only thing the system will tell you is if the coolant reservoir cap isn’t relieving pressure. And I have never, in 25+ years, seen an OE or replacement Behr cap not popping at <14 PSI.

It would have been better if the system warned you of under-pressure as that is what I almost always see: caps that pop at 3 or 4 or 5 PSI.