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Federal filingsHome›Trouble codes› B2EF0
Diagnostic trouble code

B2EF0

0 owner reports and 147 manufacturer filings across 40 model years from Infiniti, Nissan.

Body Generic OBD-II code 147 manufacturer filings

Where B2EF0 shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reportsParts
2017 Infiniti Q50Electrical System8—Battery →
2016 Infiniti Q50Equipment8—
2018 Infiniti Q70Equipment8—
2016 Nissan AltimaElectrical System5—Battery →
2018 Nissan ArmadaEquipment5—
2018 Nissan GT-REquipment5—
2017 Nissan GT-REquipment5—
2016 Nissan MaximaEquipment5—
2018 Nissan RogueEquipment5—
2017 Nissan RogueEquipment5—
2016 Nissan RogueEquipment5—
2017 Nissan SentraEquipment5—
2016 Nissan SentraEquipment5—
2017 Infiniti Q60Equipment4—
2018 Infiniti QX30Equipment4—
2017 Infiniti QX30Equipment4—
2018 Nissan AltimaEquipment3—
2017 Nissan AltimaEquipment3—
2018 Nissan LeafEquipment3—
2018 Nissan MaximaPower Train3—
2017 Nissan MaximaEquipment3—
2018 Nissan MuranoPower Train3—
2017 Nissan MuranoPower Train3—
2018 Nissan PathfinderEquipment3—
2017 Nissan PathfinderEquipment3—

Showing the 25 model years where B2EF0 appears most; it is on file for 40 in total.

A model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.

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B2EF0 by make

The same record, one make at a time: the model years, bulletins and owner reports that name B2EF0 on that maker’s vehicles.

Nissan 27Infiniti 13

What it gets filed under

Equipment 79 Electrical System 40 Equipment Adaptive/Mobility 12 Power Train 12

147 manufacturer filings name B2EF0. Start with what the maker wrote down.

A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.

Photo: Compagnons / Unsplash

Manufacturer filings that name it

Source: NHTSA manufacturer communications

Service bulletins and campaigns whose filed summary names B2EF0.

What B2EF0 means

Source: SAE J2012 / OBD-II

B2EF0 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.

A stored code names the test that failed, never the part that caused it. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.

From here

Common questions about B2EF0

Source: NHTSA files and the OBD-II standard

Can I keep driving with B2EF0 stored?

Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. The safe read of this page is the mileage and the components, not permission.

Does a code mean the car is recalled?

No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.

Why do the counts here differ from other sites?

Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.

Will clearing the code fix it?

Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.