Oil pressure maxed to 73psi while driving down to 30 ish when idle
Image (Click to enlarge)
Jun 14, 2026 at 12:49 AM
2018 Cayman 718 high oil pressure. No warning lights?
2018 PORSCHE CAYMAN
RAFA_HUDSON
- MEMBER
- 3 POSTS
Advertisement
O wow, yep that is not good, I would replace the oil pressure senso first and then clear the codes. Here is the location so you can swap it out. Clear the codes once completed.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Aug 1, 2026 at 12:14 PM
I replaced the oil sensor with a Porsche oem part and nothing changed. (Old sensor was not bad, i assume)
I suspect the issue is slightly damaged wire that signals the instrument cluster which could potentially loose voltage under acceleration (engine movement/vibration) causing the bad reading only while driving and back to normal reading during idle.
I have a picture that support my theory, however since the image quality is not the best, i could be totally wrong.
I suspect the issue is slightly damaged wire that signals the instrument cluster which could potentially loose voltage under acceleration (engine movement/vibration) causing the bad reading only while driving and back to normal reading during idle.
I have a picture that support my theory, however since the image quality is not the best, i could be totally wrong.
Image (Click to enlarge)
Aug 1, 2026 at 2:59 PM
If the wire is broken then that is the problem, you could have a bad connector as well, I would get a new oil pressure sender pigtail and replacing it, that should fix the problem.
Aug 2, 2026 at 8:59 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.