39 problems related to engine and engine cooling have been reported for the 2020 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Nissan Altima based on all problems reported for the 2020 Altima.
Car continually goes into malfunction mode. It goes away when the car is turned off and re started. It throws a code for mass air flow sensor. Have replaced mass air flow sensor three times. No dealership or mechanic can find an issue. Sometimes, the collision warning goes off for no reason causing panic. This has been going on for a year. Began March 2022.
Parked the car for roughly 10 minutes. Came back and started car with all lights on dash illuminated. Hard to drive, hard to steer and could not tell how fast vehicle was moving as speedometer didn't work. This has happened before, had it taken to Nissan dealer. Advised that they couldn't duplicate the lights issues after it sat for 3 days before "resetting" itself.
During cold temperatures the car accelerates poorly, engine rpm is unusual. At least one instance of the engine warning light illuminates with a "service now" message displayed. In all cases the vehicle engine was running, in (slow) motion, and on a city street and one incident on a highway going straight ahead. A service department of a Nissan dealer was contacted and they stated that they have received multiple complaints of this nature about this call year and model.
The engine light constantly comes on. Have had the solenoid valve timing control replaces twice and engine light back on for the same problem. I have had my car for 6 months and has been in the shop frequently.