The Lemon IndexB1448 is a manufacturer-specific code, so its exact meaning depends on the make. Full B1448 page
34 owner complaints · the #2 code Hyundai Sonata owners name · 11% of Hyundai Sonata complaints that name a code (every car: 0.5%)
Middle of 99,000 miles · most between 78,000 and 131,000 (23 owners gave it)
Hyundai Sonata owners named B1448 in 34 complaints to the U.S. government (NHTSA), most often on the 2006, 2007 and 2008 model years, at a middle of 99,000 miles. The part they name most is the engine software (a reflash) (3 complaints). Complaints are owner reports, not proof of a defect.
Hyundai Sonata model years that report B1448
Owner complaints naming B1448, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
99,000 miles is the middle of what 23 owners entered. Half were between 78,000 and 131,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the engine software (a reflash), in 3 of the 34 complaints (9%). 2 of those mention it being replaced or repaired, and 1 say the problem came back afterwards.
- Software update (reflash)3 complaints2 mention a repair or replacement, 1 of them says the problem came back
19 complaints mention a recall and 5 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.
Codes owners report with it
B1706 2
Other codes named in the same Hyundai Sonata complaints, and in how many.
Keep going
- B1448: meaning, causes and every car that reports it
- Hyundai Sonata reliability by year
- 2006 Hyundai Sonata problems and recalls
Other codes Hyundai Sonata owners report
B1448 on other cars
Hyundai Accent (13)
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 B1448 means
B1448 is a manufacturer-specific code: each carmaker decides what it means, so the same code can point to different problems on different brands. We haven't verified its meaning for Hyundai 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): 11725992, 11478910, 11364018, 11361855, 11342437, 11331440, 11331346, 11322507, 11278396, 11254215, 11162173, 11152236 and 22 more.
Quick answers
Which Hyundai Sonata years have the most B1448 complaints?
In complaints to NHTSA, owners of the 2006 (15), 2007 (10), 2008 (9) Hyundai Sonata named B1448 most (34 complaints in all, 2006–2008). Raw counts, not a failure rate.
What fixes B1448 on a Hyundai Sonata?
Owners most often name the engine software (a reflash) (3 of 34 complaints). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does B1448 show up on a Hyundai Sonata?
Owners who gave their mileage reported a middle of 99,000 miles; half were between 78,000 and 131,000 (23 owners).
Sources: NHTSA owner complaints that name B1448 on the Hyundai Sonata, 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.