2012 Nissan Altima power train problems

“I drove out of town about 40 miles and everything was fine, next day went to leave to come home and immediately noticed high RPMs going about 20MPH. I pulled over, turned the car off and turned it back on, started driving and same thing. I had no choice but to drive it on the interstate. I could get up to 60 very carefully but I was still sitting around 4000rpms. It wouldn’t shift gears at all (I know it’s a CVT and doesn’t have gears). I then noticed a high squealing noise, thankfully made it home with a lot of honking and middle fingers even though I had my hazards on. Once I made it home, plugged in my OBD scanner and had a pending DTC of P1778 which I have found to be the stepper motor. Aka the death code. It’ll start, shift into all other gears, but is making a high squealing noise even when idle and in park and when revving in park the squeal gets louder. I even attempted the “semi manual’ to see if I could get it to catch, I couldn’t at all. No matter what “gear” I was in it wouldn’t bring the RPMs down.”

“The vehicle is unsafe to driver and others on the road. The power steering hose has had a leak since it was manufactured and was not fixed by the manufacturer at all! Tie rods gave away within 5 years of a mileage less than 24,200 miles. Cv joints along with tie rods have been easily compromised and damaged causing loss of control and steering .suspensions are no longer in tact nor reliable and will pose a danger. All errors were not found by manufacturer and has caused immediate danger to not only driver but everyone on the road. The engine has a rattle only after 2 years which is not usual.”

“The contact owns a 2012 Nissan Altima. The contact stated that while driving at an undisclosed speed and attempting to accelerate, the vehicle briefly lost motive power before slamming into gear. The contact stated that several unknown warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The vehicle was not repaired for the most recent failure. The contact stated that the vehicle was taken to several independent mechanics after purchasing the vehicle and the mass air flow, spark plugs, sensor coils, and other various engine parts and catalytic converters were replaced; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was unknown.”

“Service Engine Soon light on. Was driving on highway at 55mph Transmission started to slip and car started to slow down while I was pressing gas pedal. The more I pressed on gas pedal the more the car lost acceleration. Had to move off to side of the road and turn car off. Took to mechanic and had transmission flushed and plate replaced. Transmission needs to be replaced. Ran diagnostic and codes for Transmission comes up.”

“I have a 2012 nissan altima that I purchased in 2018. in florida. check engine light appeared first. it currently doesn't run because of the transmission. it doesnt excelerate above 20mph. is there is a nationwide recall because of the cvt transmissions going bad?. I already tried to fix 2 separate parts on the transmission the code I'm getting is p1778. I changed the stepper motor and valve body and it's still won't go above 20mph. I don't have 5,000 to replace a transmission. we've been stuck on the road twice in traffic when it doesn't want to excelerate above 20mph”

“Transmission spudders at times. It is very delayed when pulling out sometimes. Turning the car off and back on might help sometimes. Car will go in limp mode. Nissan dealer said it was the Transmission. There is a big safety concern because when you push the gas trying to cross an intersection, it might lag behind and not go. This could result in being hit. This has been a great car but the cat is complete junk and Nissan should be ashamed of themselves for this. If they get enough law suits they may change something. Well maybe, They don't care about peoples lives.”