Porsche Cayenne Hybrid Overheating: Warning Signs & Help

Hey there! I had a similar issue with my 2014 Panamera Hybrid (I also owned a Macan before). I have some experience working on cars, but I mostly trust my regular workshop for these things. When I faced overheating warnings, I took it to my trusted mechanic right away. Turned out it was just low coolant level, they topped it up and did a quick check for any leaks. The whole thing cost me around 52.50€, pretty straightforward fix. But before I can share more specific advice, could you tell me: Have you noticed any coolant puddles under your car? When exactly do these warning lights come on? What's your mileage? These details would help me better understand if your situation is similar to what I experienced. Cayennes can be tricky, so it's better to be thorough!

Thanks for sharing your experience! I'm at 125484 KM and just had my service done last month. I haven't noticed any puddles under the car, but the warning lights usually pop up after about 15-20 minutes of driving, especially during stop-and-go traffic. It's definitely concerning since the Hybrid system adds another layer of complexity to the cooling system. Did your mechanic mention anything about the electric motor cooling circuit when you had your issue?

Hey again! Thanks for those extra details. Yeah, when I had my Panamera Hybrid serviced, my mechanic actually did mention the electric motor cooling system. It's funny you brought that up because hybrids do have that extra complexity with two cooling circuits, one for the combustion engine and another for the electric components. In my case, when I was getting those warnings after about 15-20 minutes of driving (just like you're experiencing), it turned out that while the low coolant was part of the issue, there was also a small leak in one of the coolant hoses near the electric motor cooling circuit. The stop-and-go traffic situation you mentioned really rings a bell, that's exactly when my car would start showing warnings too! Given that you've just had service done last month, I'd definitely get it checked out. My mechanic mentioned that sometimes after service, air pockets can form in the cooling system if it wasn't bled properly. Plus, with that mileage (mine was around 130,000 KM when I had the issue), these things can pop up. I'd recommend getting it checked soon, don't wait like I initially did. Would love to hear what your mechanic finds out. Keep us posted!

Thanks so much for the detailed follow-up! That's really helpful info about the dual cooling circuits and the air pocket possibility. You're right, I shouldn't wait on this. I've actually just made an appointment with my mechanic for tomorrow morning. The similarity between our situations, especially with the timing of the warning lights and the stop-and-go traffic symptoms, is pretty striking. Really appreciate you sharing your experience with the Panamera Hybrid, it's given me a much clearer picture of what to discuss with my mechanic. I'll definitely update the thread once I find out what's going on with mine. Thanks again for taking the time to help out!