NHTSA Complaint #11506848 — 2022 NISSAN FRONTIER

The truck is giving false data for gas mileage the truck is reading a lot higher gas mileage than I'm actually receiving my truck on average gets 15 miles a gallon but the truck itself States is getting 19 to 20mpg. The truck started receiving poor gas mileage after they did the TCM update to the truck in October 2022. I have an app that tracks my gas mileage and it shows the truck getting a lot less MPG than what the computer on the truck indicates. On average there's about a 4 to 5 mile per gallon deviation from reality versus with the truck indicates. The truck used to get 18 to 20 miles per gallon when I 1st purchased it in May but after the TCM update in October it no longer even gets close to 17 miles a gallon which indicates on the sticker. Full disclosure I drive 95% in the city only. Transmission shifting issues. When I drive the transmission lags has weird shifting characteristics when the transmission is cold I was able to reproduce this on a brand new Nissan frontier that had the TCM update. The truck has a slipping issue of not wanting to go under its own power when driving from a stop sign or stop light the truck acts like it doesn't want to move when you give it fuel. Talking with the service adviser at Nissan Dealership I am not the 1st person to complain about this issue. All the problems that I am discussing happened after the tcm update. I've tried calling Nissan directly and I get nowhere but the run around no one wants to take responsibility for the update issue and I've even had a long conversation with their specialist who took my vehicle out and proving to them that I was getting poor gas mileage and weird shifting characteristics and still they have yet to resolve my issue or offer a solution to my issue.