The Lemon IndexB1B02 is a manufacturer-specific code, so its exact meaning depends on the make. Full B1B02 page
19 owner complaints · the #2 code Jeep Wrangler owners name · 9% of Jeep Wrangler complaints that name a code (every car: 0.2%)
Middle of 64,000 miles · most between 55,000 and 82,000 (12 owners gave it)
Jeep Wrangler owners named B1B02 in 19 complaints to the U.S. government (NHTSA), most often on the 2013, 2012 and 2011 model years, at a middle of 64,000 miles. The part they name most is the wiring or a connector (2 complaints). Complaints are owner reports, not proof of a defect.
Jeep Wrangler model years that report B1B02
Owner complaints naming B1B02, 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
64,000 miles is the middle of what 12 owners entered. Half were between 55,000 and 82,000 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 wiring or a connector, in 2 of the 19 complaints (11%). 1 of those mention it being replaced or repaired, and 1 say the problem came back afterwards.
- Wiring or a connector2 complaints1 mentions a repair or replacement, 1 of them says the problem came back
13 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.
Codes owners report with it
B1B06 2
Other codes named in the same Jeep Wrangler complaints, and in how many.
Keep going
- B1B02: meaning, causes and every car that reports it
- Jeep Wrangler reliability by year
- 2013 Jeep Wrangler problems and recalls
Other codes Jeep Wrangler owners report
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 B1B02 means
B1B02 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 Jeep 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): 11734495, 11624505, 11624478, 11599446, 11591736, 11552031, 11425680, 11394824, 11251832, 11187037, 10909988, 10894745 and 7 more.
Quick answers
Which Jeep Wrangler years have the most B1B02 complaints?
In complaints to NHTSA, owners of the 2013 (4), 2012 (3), 2011 (3) Jeep Wrangler named B1B02 most (19 complaints in all, 2008–2018). Raw counts, not a failure rate.
What fixes B1B02 on a Jeep Wrangler?
Owners most often name the wiring or a connector (2 of 19 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 B1B02 show up on a Jeep Wrangler?
Owners who gave their mileage reported a middle of 64,000 miles; half were between 55,000 and 82,000 (12 owners).
Sources: NHTSA owner complaints that name B1B02 on the Jeep Wrangler, 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.