2019 Porsche Cayenne Electrical system Problems

“Last year around january, adaptive cruse control stop working after dealer fixed almost closing a collision ( vehicle in motion), today park assist stop working 360 degree view completely off and no sound of proximity obstacles, ( vehicle in motion pulling of parking lot)”

“There's an electrical issue with the vehicle (it is an e-hybrid) with error messages that run in a continuous loop (acc not available, pas restricted, driving light control error, high beam assist not available, lane keep assist restricted). The local dealer has not yet been able to fix the issue. Car is under warranty and has been in the shop for a month. We were called two times to pick up a fixed vehicle and each time we had to return the car almost immediately upon leaving the dealership since the problem was not fixed. …”

“In September 2022 the yellow battery warning light appeared on my dash while my car was still under warranty. Porsche had an open Campaign WMJ9 that involved a software update that resolved the issue. Last month, June, while my car was now out of warranty the same yellow warning light appeared but this time the dealership recommended i replace the battery at a cost of $3,200 Porsche refuses to accept that these 2 instances are related and that the battery should be covered since the software update during my first service visit didn't offer a long term solution. …”

“Porsches with LiFePO4 Lithium batteries (like mine 2019 Cayenne S) have a software/hardware error that causes the battery to incorrectly send a code to the battery management system so that it will suddenly shutdown the battery permanently and will require a full battery replacement, which the dealers abuse its customers by charging $3,000 to $5,000 dollars and give a battery replacement date as almost one year later. …”

“The hybrid cooling system on my 2019 Porsche Cayenne E-Hybrid repeatedly displayed a red dashboard warning while the vehicle was in motion: Hybrid coolant level too low / Park vehicle safely / Let vehicle cool down. This warning appeared on multiple occasions at speeds of approximately 22 mph, 38–40 mph, and 47 mph, as documented in timestamped photos and videos taken in November 2025. A separate warning in July 2025 read: Engine cannot be started / Remove charger plug. The warnings indicate a potential thermal management or hybrid cooling system failure. …”