2020 Nissan Altima: Engine malfunction power reduced service now
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Altima report: engine malfunction power reduced service now. CarComplaints.com lists 2 owner complaints, average mileage 48,650 miles.
NHTSA has 41 owner complaints for the 2020 Altima in this area. Examples:
- NHTSA complaint ODI #11756811 (filed 08/13/2026): “The contact owns a 2020 nissan altima. the contact stated that while driving at an undisclosed speed, the message "engine malfunction" was displayed. additionally, the vehicle experienced excessive coolant consumption and the engine overheated. the vehicle was…”
- NHTSA complaint ODI #11752874 (filed 07/26/2026): “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.…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: none clearly reported. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto