The Lemon IndexB0020 is a body code from the standard list, but carmakers often use these codes their own way, so its exact meaning depends on the make. Full B0020 page
23 owner complaints · the #3 code Nissan Altima owners name · 10% of Nissan Altima complaints that name a code (every car: 0.4%)
2013–2018 Nissan Altima · most: 2017 (6), 2016 (6), 2015 (4)
Nissan Altima owners named B0020 in 23 complaints to the U.S. government (NHTSA), most often on the 2017, 2016 and 2015 model years. The part they name most is the wiring or a connector (5 complaints). Complaints are owner reports, not proof of a defect.
Nissan Altima model years that report B0020
Owner complaints naming B0020, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
What owners say caused it or fixed it
The most-named part is the wiring or a connector, in 5 of the 23 complaints (22%). 2 of those mention it being replaced or repaired, and 1 say the problem came back afterwards.
- Wiring or a connector5 complaints2 mention a repair or replacement, 1 of them says the problem came back
7 complaints mention a recall and 3 mention a warranty.
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Keep going
- B0020: meaning, causes and every car that reports it
- Nissan Altima reliability by year
- 2017 Nissan Altima problems and recalls
Other codes Nissan Altima owners report
P0776 P0335 P0420 P0725 P0101 P0841 P17F0
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What B0020 means
B0020 is in the standard body code range, but carmakers often define body codes their own way, so the same code can point to different problems on different brands. We haven't verified its meaning for Nissan yet. A dealer or a scanner with the maker's software can tell you exactly.
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 11773199, 11752882, 11750262, 11716581, 11716335, 11689757, 11680685, 11649572, 11608746, 11558546, 11552460, 11547556 and 11 more.
Quick answers
Which Nissan Altima years have the most B0020 complaints?
In complaints to NHTSA, owners of the 2017 (6), 2016 (6), 2015 (4) Nissan Altima named B0020 most (23 complaints in all, 2013–2018). Raw counts, not a failure rate.
What fixes B0020 on a Nissan Altima?
Owners most often name the wiring or a connector (5 of 23 complaints). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
Sources: NHTSA owner complaints that name B0020 on the Nissan Altima, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.