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I have MY2004 Cayenne-S and getting hopeless. The car can start no problem each time when is cold and very strong cranking, but when the engine gets hot it can't be cranked...seems like seized engine. Changed 3 new batteries, 3 different good brand names batteries but no help, so believe it is not battery issue. When I forced to crank when engine hot couple times I can smell electric short...guess is too heavy to crank and killing the starter.   Also the engine is running poorly when engine hot and forced the RPM to be very low and then stall.  Used Mobil1  0W-40 engine oil and changed no long ago. Basically it is not derivable when engine reaching hot temperature and would stall, then cannot start.

What could be the real issue?  I always and only have the CEL P0016 and P0341 for past 5 years and knowing from stretch chain so did not bother to fix it until now. No other CELs and no vacuum leaking.

Can anybody help for this weird issue?  All the symptoms bringing me to think about bad lubricant and seizing engine, but how? When engine hot aater temp gauge pointing to above middle and stays at 3/5. Any input will be great appreciated!



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Sounds like stretched cam chain (P0341 Camshaft position sensor 1), needs replaced to fix the rough running. Hotter engine makes the worn chain just that little bit longer to the point where it's way out in timing.


Suggest you check the current draw of your starter. If it is very high and causes big voltage drop them maybe you have a bad starter motor. Most diagnostic tools have the crank voltage menu where you can check this.

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