2020 Porsche Taycan Fuel system Problems

Component/system: High-voltage (HV) battery system and power electronics. 2020 Porsche Taycan Turbo, VIN [XXX] . Vehicle available for inspection. Safety risk: Since January 2025, the vehicle has repeatedly displayed a "pull over and park safely" emergency warning and shut off unexpectedly while driving at highway and surface road speeds. Sudden loss of propulsion at speed created serious collision risk. Dealer-confirmed: Porsche Woodland Hills documented (July 2025): "vehicle just shut off on him as he was driving — multiple occurrences." A second shutdown was confirmed August 2025: "vehicle shut off while driving — high voltage battery error." Four or more repair visits under my ownership for this same defect. Fault codes confirmed by authorized Porsche dealers: P0AA600 (HV Battery Voltage System Isolation Fault — highest severity), P0A4000 (Rotor Position Sensor Fault), U178800 (Front Axle Power Electronics Drive Fault), P061B00 (Torque Calculation Fault). November 2025: Porsche Downtown LA isolated all 33 battery modules, found modules 6, 19, and 32 defective — all physically replaced. Vehicle out of service 9+ weeks. Shutdown warning recurred during same visit. Porsche NA (Case #XXX) denied repurchase. Warning lamps: "Pull over and park safely" warning and HV battery error appeared suddenly before each shutdown. No gradual symptoms. Recurring since January 2025. Additional: Prior owner records show HV battery water intrusion (February 2024) requiring full battery removal and reinstallation. In July 2024, dealer cleared "numerous inactive fault codes" without disclosure prior to my purchase. Porsche NA has acknowledged the issue by offering goodwill compensation while refusing repurchase. Cumulative out-of-service days for this defect exceed 75 days across multiple repair visits. I request NHTSA investigate whether this defect exists across other Taycan vehicles and whether a recall is warranted. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11738439

Incident

Jan 15, 2025

The vehicle has now gone into Turtle Mode three times in the last month. Twice to dealership without fixing issue. Turtle mode renders the car undriveable. There is no propulsion, car won’t go over 20 mph

NHTSA ID

11734713

Incident

Mar 9, 2026

While driving, shortly after a turn, the electric motor has a fatal error resulting in complete loss of power while driving. The car has to be stopped in the middle of the road and powered down and then turned back on. This clears the fault but the problem has occurred 3 times within a month resulting in me not driving it anymore.

NHTSA ID

11630335

Incident

Dec 3, 2024

Vehicle lost all power with no response from the accelerator pedal causing me to almost get killed on a two lane highway. I was able to somehow coast into the grass on the side of the highway

NHTSA ID

11601646

Incident

Jul 12, 2024

There is obviously a design flaw in the fan cooling system for the main high voltage 93.4 kw battery. The cooling vents allow small gravel to enter the intake ports powered by fans to cool the battery. (this is a major issue for areas of the country where gravel is used for winter road maintenance. This issues arises every snow season) Gravel gets into the ports and can possibly jamb the fan propeller blades thus not being able to cool the battery properly. I have a work order at the dealership to clean out the cooling ducts. when the gravel enters these ducts they make a grinding sound when the fans engage. The dealership reported this to the manufacturer, and the response from the manufacturer was it is not their issue. The service dealership said additional screening over the intake ports can not be done because information from the manufacturer states this would impede the necessary airflow to cool the batteries. To further bring attention to this design issue, the high voltage 93.4 kw battery failed, July 19, 2023 at 17,551 miles.

NHTSA ID

11564207

Incident

Jan 5, 2024

Main HV Battery failure, "Electrical System Error" displayed, fortunately this occurred when pulling into the garage. Vehicle would not go into drive or reverse, vehicle had to be towed to the dealership. This could have ended very differently if on the highway. HV Battery Module and 12v battery replaced.

NHTSA ID

11529278

Incident

Apr 17, 2023

HV battery failure. No warning. Vehicle could not be put in gear or moved. Vehicle has been at Porsche Conshohocken since 12/23/2021. No resolution as of 02/04/2022. Vehicle has been out of service 47 days.

NHTSA ID

11450684

Incident

Dec 22, 2021

Car completely shut down in an intersection, lost all power and would not move, error read: Motor control error stop vehicle in a safe place. prior to shutting down the vehicle jerked and slammed on the brakes in a busy intersection.

NHTSA ID

11420734

Incident

Jun 12, 2021

WHILE DRIVING ON THE FREEWAY AT C. 55MPH IN MODERATE TRAFFIC, THE CAR LOST ALL MOTOR POWER AND STARED TO COAST TO A STANDSTILL. AN ERROR WAS ON THE DISPLAY SAYING 'DRIVE SYSTEM CONTROL FAULT - PARK VEHICLE SAFELY. I MANAGED TO GET TO A SLIP ROAD OFF THE FREEWAY AND THE CAR JUDDERED TO A HALT FROM AROUND 15MPH UNTIL COMPLETE STOP. THERE WAS NO RESPONSE THE THROTTLE AT ANY TIME. I POWERED OFF THE CAR USING THE POWER BUTTON ON THE DASHBOARD, THEN IMMEDIATELY SWITCHED IT BACK ON. ONCE BACK ON, THE CAR WAS OPERATING NORMALLY. THIS HAS BEEN REPORTED ON PORSCHE TAYCAN FORUMS HTTPS://WWW.TAYCANFORUM.COM/FORUM/THREADS/MOTOR-CONTROL-ERROR-AND-SYSTEM-ERROR.3114/

NHTSA ID

11414731

Incident

May 1, 2021

Mileage

4,950 mi