2020 Nissan Altima: sudden loss of power

Filed Nov 2, 2026 · Acceleration, Engine · LA

The components and systems experiencing problems in my 2020 Nissan Altima S 2.5L include the engine, throttle body, and mass airflow (MAF) sensor system. The vehicle has experienced severe engine performance issues, including excessive fuel consumption, jerking, hesitation during acceleration, reduced engine power, and unexpected limp mode. The safety of myself and others were put at risk because the car did not accelerate anymore in the middle of on going traffic. It was me and my 2 underaged children in the car. Yes it has been confirmed by an independent service center. Yes, insurance representatives and others including mechanics. Check engine light appeared

Filed Sep 6, 2025 · Transmission · IL

Many times while I'm driving, I feel a jerky motion. when I am at a stop light, and proceed to hit the accelerator, it will not pick up. I have lost power, the car will jerk while I'm driving. The RPM will rave go up. It's very dangerous because I can be driving and the engine will lose or reduced power. I get a whining sound, like my transmission, is gonna go out.

Filed Jul 5, 2025 · Engine · MS

My car is said malfunction Loss of engine power

Filed Apr 23, 2025 · Transmission · FL

Description of the Problem: For the past three years, my vehicle has experienced intermittent and sudden loss of power while driving, including on the highway. The issue is ongoing and has not been resolved despite having the throttle body replaced three separate times, totaling approximately $4,500 in repairs. Each replacement has resulted in the exact same malfunction: the car enters limp mode, drastically reducing power, which is especially dangerous when my children are in the vehicle. Component/Inspection: The issue appears to involve the throttle body and possibly the CVT transmission or related electrical system. The component has been replaced multiple times and is available for inspection if needed. Safety Risk: This malfunction puts my safety and the safety of my passengers at significant risk, particularly when driving at high speeds or in heavy traffic. The car's sudden loss of power makes it difficult to accelerate or maintain speed, which could easily lead to a collision/serious injury. Problem Reproduced/Confirmed: Yes. The problem has been witnessed and confirmed by Midas of Palm Bay, FL and Nissan of Melbourne, FL. Manufacturer Involvement: I reached out to Nissan, but they refused to assist with the repairs or offer any support. Warning Signs/Symptoms: Before the failure, the check engine light comes on, followed by a warning message that reads “Engine Malfunction.” Immediately after, the vehicle loses power and cannot accelerate normally.

Filed Jul 9, 2024 · Engine · PA

Received engine malfunction reduced power service now message while driving (received message 6 times so far). Error goes away when I shut car off and restart it, no code is found when scanned at nissan dealership. Car seems to shift weird during a stop and feels like it runs rough but nothing is ever found at dealership to be the cause.

Filed Dec 13, 2023 · Brakes, Steering · GA

1. Power steering cuts off while driving. Occurs intermittently -- once every two weeks or so. I am guessing that the intermittent nature of this is why more have not reported it. Warning lights show on dash indicating ABS, etc. but codes disappear when car is turned off and back on. Yes, you can inspect this. We bought a BlueDriver OBDII with an app because we couldn't capture this and the dealer couldn't recreate the problem. I have the records of the codes. We were able to get the vehicle to the dealer while still running and they are fixing it by replacing the ABS computer (at significant cost). 2. Sudden loss of power steering could result in a major accident -- especially in emergency situations, at higher speeds or if the driver was weaker/smaller. My wife drives this car, and it was a major shock when this happened. Fortunately, she was moving less than 30 mph when this happened -- and she was not trying to avoid an accident. 3. The problem has been reconfirmed by Regal Nissan Service at this time. [XXX] See above for description of how hard it was to capture this condition. 4. The component has been deemed unworking. I believe that the dealer is just replacing it, however, vs, in-depth diagnosing at the corporate level. 5. The warning lights come on at the same time the power steering stops. There is absolutely no pre-warning. We have no idea if the ABS system also stops working because conditions were dry, speed was low, no slamming on of brakes -- but I am guessing that the ABS also wouldn't work. That's a guess. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 26, 2023 · Electrical, Transmission · FL

What component or system failed or malfunctioned and is available for inspection upon request? On June 6th, the vehicle started losing power when accelerating, happened at night when driving back home, and scared me because there were no lights indicating any issues. The following day, less than a mile from the dealership, all the dashboard lights turned on, the vehicle lost complete power, and then i turned vehicle off and try to turn it back on but it didn't started. I called a tow truck and left it at the dealer. They informed me that they would provide me with the reason for the failure by the end of the afternoon. I was later informed by the dealership that there was an electrical problem with the transmission system. The system failure was related to a power train not getting communication due to a broken/damage wire harness that was close to the left side powertrain/engine mount. The harness was damaged because of the engine mount bolts broke and metal part of the mount cut part of the harness, creating an electrical short to the powertrain system as seen in the attached photos. This kind of short can definitely create heat into the harness that could have gotten my car to catch fire. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the same dealer informed me about the damage, and they themselves were puzzled because they couldn't find an explanation for how this could happen, but they did not take any ownership by the fact that that defective engine mount could have had me into a major accident if I was driving in the highway. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? All the work was carried out at the dealership itself. And I don't think that the dealership send any notification to the manufacturer about the early failure of such an important component but going through different mechanics shops they all share the same opinion that the......

Filed Jun 20, 2022 · Electrical, Engine · CA · fire

Driving on the freeway car started losing power, pulled over and then caught fire in matter of minutes the whole car was engulfed in flames. Fire department said it was an electrical fire near the battery and the fire wall on the driver side.

Filed Jun 6, 2022 · Electrical · CA · fire

Driving car on the freeway and car lost power. Turned the car off and checked all the fluids to make sure they were at proper levels and found no issue. Started car back up and then started smoking, open the hood and an electric fire had started, tried putting out with a fire extinguisher and it did nothing 2 min later the whole car was in flames.