The National Highway Traffic Safety Administration (NHTSA) has opened an investigation into 2020-2021 Porsche Taycans, following nine complaints from owners and two field reports about a loss of power.

The reports suggest the Taycan can lose power, “while in motion, at any speed without warning to the driver.” However, some people said they received a message stating “electrical system error” and were then instructed to park the vehicle in a safe place, though there was no warning that the car might become immobilized.

Six of the complainants said they were not able to start the vehicle again after they lost power. The NHTSA said the investigation is still in a preliminary stage, but suggested a loss of charge in the 12-volt auxiliary electrical system may be deactivating the entire electrical system. The agency also added they are looking at 12,146 vehicles.

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However, Porsche told Automotive News it has only sold 6,552 Taycans from the 2020-2021 model years in the United States. A spokesperson told the outlet they weren’t sure where the NHTSA was getting their numbers, “but it bears no relation to the number of Taycans in this country, either sold or in transit, or inventory.” The company added it was aware of the issue and had received an inquiry from the NHTSA.

“We are already underway in addressing this issue and look forward to answering NHTSA’s questions and quickly resolving the underlying issue, should one be confirmed,” the spokesperson said. “All Taycans remain safe to drive. We are not aware of accidents reported in connection with this issue.”

If the investigation finds a persistent fault or manufacturing defect in the Porsche Taycan, it may lead to a recall of the electric vehicle.