2020 Nissan Altima: check engine light

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 Jul 26, 2026 · Engine · GA

When I am driving my car randomly states check engine and makes a beeping noise and then the engine starts to make some type of combustion noise and then slows down and then turns off.

Filed Mar 9, 2026 · Transmission · IL

The “check engine” light came on - after shutting off the engine a couple times - it still came on. Took the 2020 Nissan Altima Platinum to Glendale Nissan - after a 3 hour wait they said I need a new Cam Shaft for $6,000. The car only has 42,000 miles. I took the car to get a second option - they want $9,000 to fix it. So I called Nissan to enter a claim on February 20. It took Nissan until March 9 to respond - that they would NOT give any assistance to fixing the Cam Shaft. The car was 10 months out of time warranty and 18,000 under mileage warranty - I understand time trump’s mileage. We have owned many cars the last four have been Nissan Altimas. Never have we had a catastrophic event like this with a car. At the very least this incident should be added to the records of issues with Nissan cars that might lead to a recall.

Filed Jan 29, 2026 · Engine · KS

Message popped up while driving saying “engine malfunction power reduced service now”. Pairs with the check engine light coming on

Filed Dec 17, 2025 · Airbags · CA

On October 31, 2025, I noticed the Check engine light was on, after inspecting the car at the closest car shop the technician noticed white powder on the driver side knee airbag cover. Next morning I brought my vehicle to Temecula Nissan telling about airbag powder leakage. But this issue was completely ignored by the Advisor, who for some reason decided to fix another issue but ignoring my airbag issue concern. When I tried insisting to inspect the airbag saying:" I worry it may unexpectedly deploy or not deploy in case of a car accident. And my nose and throat are very irritated possibly because of inhaling the powder", the advisor looked at the airbag cover finally noticing the powder and said:" It's not a problem, we will wipe the powder off", despite my concerns. When I came to pick up my vehicle, I asked if my airbag issue was taken care of and documentations have been provided, I was told "Yes, we sent you a link". But it was no information about airbag inspection request or what work was done on it. I immediately went to speak with General manager of Temecula Nissan, who promised to inspect and fix the airbag issue next workday but nobody contact me since then and message I left for the manager on the phone was completely ignored. After filing a complaint to Nissan Consumer Affairs, I was told that nothing they can do about it and advised to get a second opinion from another Nissan dealership. So I did. Pedder Nissan Advisors took my concerns seriously, they said that it is dangerous to drive my vehicle in that condition, they did an inspection and took my car to replace the defective airbag.

Filed Jul 15, 2025 · Brakes, Driver assistance · 60,000 miles · LA

The contact owns a 2020 Nissan Altima. The contact stated while driving approximately 50 MPH, the vehicle lost motive power. The contact stated that the message "Engine Malfunction" was displayed, and the check engine, traction control, and Forward Collision Avoidance warning lights were illuminated. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the mass air flow sensor needed to be replaced. The vehicle was repaired but the failure reoccurred days later. The vehicle was then taken to an independent machinic where it was diagnosed and determined that the battery needed to be replaced. The vehicle was repaired but the failure persisted. The contact stated that the battery was replaced three additional times by several independent mechanics; however, the failure reoccurred. The manufacturer was not notified of the failure. The failure mileage was approximately 60,000.

Filed Jul 8, 2025 · Engine · SC

My check engine light comes on & the it will go off then back on again…

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 Feb 5, 2025 · Engine · FL

On the way to work a warning error message came across the dash board saying “ Engine Malfunction Power reduced. Service now” then is turned off. The engine light didn’t come on until a month later saying P0101. P0101 was fixed but the engine malfunction still comes and goes.

Filed Jun 20, 2024 · Driver assistance, Electrical · TX

I was driving on the Freeway and without warning my car reduced speed. Then there was a warning bell that showed engine malfunction power reduced. Then the check engine light came and my rear and front warning indicator came on

Filed Feb 16, 2024 · Transmission · TX

I bought a used (7,000 miles) 2020 Nissan Altima 2.5 SV. Bought the car on January (18-19th) 2022 with a clean Car Fax. Then, on August 12, 2022 at 17,500 approximate miles the transmission failed. I was driving and suddenly the engine light came on and the car was being strange. Slight shaking, vibration, and delayed acceleration plus a few other details I cannot recall. I immediately went to the dealership since I was nearby and I did not feel that the car was safe to drive. Then I left it there for over a month (all with no loaner vehicle because they had none) and they said they needed to get me a new transmission. Needing a new transmission so soon, is not normal. The dealership even said this, but also said it is unfortunately an issue they see with their CVT transmissions. I had no prior symptoms, and this was very sudden. I had even called them to let them know I was on the way, and they said if I was not close-by that I should tow the car in because it might not be safe. It could have caused an accident if I had driven for longer, so I consider myeslf lucky and hope that other people do not have the same expierence.

Filed Apr 21, 2022 · Body · 25,000 miles · TN

The contact owns a 2020 Nissan Altima. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed that the grille shutter needed to be replaced. The contact stated that she replaced the grille shutter herself. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 25,000. The VIN was unavailable.