Porsche Cars North America will be contacting the owners of certain 2020-2021 Taycan cars because of a software error that can cause loss of engine power. The problem began when Porsche launched a software update for these vehicles on March 22, 2021.
According to the defect report filed with the NHTSA, Porsche opened a preliminary evaluation on the software update after receiving reports of drive-ability issues. The review included field reports and warranty claims which showed an increasing trend of the problem and the potential for complete loss of motive power. In June, Porsche determined a safety defect existed in the software of the pulse controlled inverter and decided to recall the affected vehicles.
Owners receiving notices will be asked to return their vehicle to an authorized Porsche dealer to have the power electronics and the engine control unit reprogrammed with an updated software and the latest powertrain software. Porsche's number for this recall is AMB5 and the NHTSA campaign number is 21V-486.
The power electronics and the engine control unit will be re-reprogrammed with an updated software.
Power electronics front axle 600A (Taycan Turbo and Turbo S): 9J1907123F
Power electronics front axle 300A: 9J1907124L (Predecessor 9J1907124P)
Power electronics rear axle: 9J1907123F