2020 Porsche Taycan: engine stalls while driving

Filed May 17, 2026 · Engine, Fuel system · CA

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 the federal safety agency 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)

Filed Oct 11, 2023 · Electrical · 10,482 miles · FL

The contact owns a 2020 Porsche Taycan. The contact stated that while driving at an undisclosed speed, the vehicle lost electrical power and stalled. The contact stated that he was able to veer to the side of the road. The contact was able to restart the vehicle; however, the failure recurred while driving. The contact stated that while making a right turn, the instrument cluster became inoperable. The contact was able to reboot the vehicle and the instrument cluster became operable. An unknown message was displayed. The service warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed that the battery had failed and needed to be replaced. The vehicle remained at the dealer for additional diagnostic testing. The vehicle was not repaired. The manufacturer was notified of the failure and offered to partially cover the repair. The manufacturer referred the contact to the dealer. The failure mileage was approximately 10,482.

Filed Sep 29, 2023 · Engine · HI

The car was suddenly stalled at road multiple times, showing red warning "Engine control error. Park vehicle in a safe place" . Porsche is unable to solve such major safety issue of its electric car for past two years.

Filed May 25, 2021 · Engine, Transmission · SC

The safety risk of having the car’s motor completely lose power on the road/highway is high, as you are then left powerless. We have not reproduced this issue ourselves. Our local Porsche dealer has looked at it and said it was a “one off” type of malfunction and could not find any issue with the car when we brought it in. The car shut off while driving and gave a “Motor control error.” The car’s interior electronics stayed on, but the car had no drive power at all. There were no warning signs or problems prior to this issue occurring

Filed Oct 13, 2020 · Engine · 1,090 miles · TN

Tl* the contact owns a 2020 porsche taycan. The contact stated that while driving out of his driveway, the vehicle stalled without warning. The contact attempted to restart the vehicle however, the vehicle failed to resume normal operation. The vehicle was towed to gossett porsche (1875 covington pike, memphis, tn 38128) where a diagnostic test was still pending. The vehicle was not repaired. The manufacturer was notified by email however, the contact had not received a response. The failure mileage was 1,090.