2015 Infiniti Q70

Driving on the highway my car suddenly lost power and has since been stuck in first or second gear after further research online it seems that a ton of Nissan/Infiniti owners both cars and suv have or had the same problem between as early as 24k-100k miles all owners I have read online has the same check engine light on with codes P0500/P0720

The contact owns a 2015 Infiniti Q70. The contact stated while making a left turn, the vehicle stalled. The contact stated that an unknown yellow warning light was illuminated. The contact stated that he was able to restart the vehicle and drove to his residence at 7 MPH. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the transmission valve assembly to be replaced. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was 124,931.

The contact owns a 2015 Infiniti Q70. The contact stated that the vehicle failed to accelerate above 40 mph. The vehicle was taken to the dealer and diagnosed that the output sensor and transmission control module (TCM) had failed. The vehicle was not repaired and remained at the dealer since the TCM part was on back-order. The manufacturer was made aware of the failure. The contact was informed that the diagnostic report would be sent once completed. The failure mileage was 72,000.

THIS CAR VIBRATES WHEN TRAVELING AT SPEEDS OF 40MPH AND 65MPH. SIGNIFICANT VIBRATION CAN BE FELT IN THE CENTER CONSOLE AND ARMREST. MY CAR HAS A ESPECIALLY SEVERE VIBRATION AROUND 40 MPH WHEN DRIVING UP A HILL AND THE TRANSMISSION IS SET TO ECO MODE. VIBRATION CAN BE FELT IN THE STEERING WHEEL AND THE DRIVER AND PASSENGER FRONT SEAT. TIRES WERE ROAD FORCE REBALANCED BY THE DEALER, BUT THE PROBLEM PERSISTS. SINCE IT IS AT ONLY CERTAIN SPEEDS, THE CAUSE OF THE PROBLEM HAS NOT BEEN IDENTIFIED BY THE DEALER.