2019 PORSCHE CAYENNE Electrical System Problems

2019 Porsche Cayennes (and other Porsche models) have LiFe P04 lithium batteries that have an internal Battery Control Module that causes a "Battery Low " indication. Porsche has been updating the software/ firmware for this module, only for it to fail again. Eventually, the battery will fail, lose charge, and become dead. There are no after market batteries available and if you are 1 mile out of the warranty period, Porsche forces you to buy a new replacement battery from them for over $2,000.00 USD plus labor. This battery failure condition for vehicles with this type of battery is well known by Porsche and they now use a completely different type of battery in their newer models. This failure should be considered a Safety issue and concern since the battery powers every safety feature the vehicle has to offer. There are pages upon pages of testimonies on the Rennlist forum...

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. Porsche has internal TSBs but it is not recalling all the customers to have the software update for the controller/sensor bug/defect so that the battery management system will not overcharge the Lithium battery and damage it or cause the battery to issue a software code that preventsbthe battery from waking up or be usable. Texas has temperatures of 110 F, and becoming stranded because the battery gets incorrectly/permanently shutdown is a death sentence to Porsche customers. Porsche is being arrogant with their customers...

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. to make matters worse the lithium battery used in my vehicle has been an issue for porsche to say the least.

Driving Light Control Error keeps on popping up on the Dash

Car died suddenly at a traffic light stop. It was later diagnosed by dealership that the battery and starter have failed.

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. I'VE CONTACTED PORSCHE CUSTOMER SERVICE BUT AS OF YET THERE IS NO RESOLUTION. IT IS VERY CONCERNING SINCE SOME OF THESE ERROR MESSAGES DO AFFECT VEHICLE SAFETY.

I LOOKED IT UP AND THIS IS WHAT HAPPENED PREVIOUSLY REPORTED BY ANOTHER OWNER. I HAD THE EXACT SAME EXPERIENCE. NHTSA ID NUMBER: 11306756. *TR

THERE'S A ELECTRICAL ISSUE WITH THE VEHICLE. PERIODICALLY, THESE ERROR MESSAGES RUN IN A CONTINUES LOOP( ACC NOT AVAILABLE, HIGH BEAM ASSIST NOT AVAILABLE, DRIVING LIGHT CONTROL ERROR, PAS RESTRICTED AND CAMERA SYSTEM RESTRICTED). THE LOCAL DEALERS HAVE NOT BEEN ABLE TO FIX THE ISSUE. I OPENED A PORSCHE COMPLAINT FILE, WHICH IS NUMBER 5574318. THIS ISSUE HAS BEEN HAPPENING SINCE THE CAR WAS DELIVERED, WHICH WAS SIXTEEN MONTHS AGO. PORSCHE HAS MADE LITTLE EFFORT IN FIXING THE ISSUE. IT VERY CONCERNING SINCE WHEN THE ERROR MESSAGES ARE ROLLING THOUGH IT AFFECTS SEVERAL SAFETY FEATURES ON THE VEHICLE.