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Federal filingsHome›Trouble codes› B156D
Diagnostic trouble code

B156D

0 owner reports and 292 manufacturer filings across 84 model years from Ford, Jeep, Lincoln.

Body Manufacturer-specific 292 manufacturer filings

Where B156D shows up

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reportsParts
2020 Ford FusionElectrical System11—Battery →
2019 Ford FusionElectrical System11—Battery →
2020 Lincoln NautilusEquipment10—
2019 Lincoln NautilusElectrical System10—Battery →
2020 Lincoln MKZElectrical System8—Battery →
2019 Lincoln MKZEquipment8—
2018 Lincoln MKZPower Train6—
2020 Ford EdgeElectrical System5—Battery →
2019 Ford EdgeElectrical System5—Battery →
2020 Ford ExpeditionElectrical System5—Battery →
2019 Ford ExplorerElectrical System5—Battery →
2018 Ford ExplorerElectrical System5—Battery →
2020 Ford F-150Electrical System5—Battery →
2019 Ford F-150Electrical System5—Battery →
2020 Ford F-250 Super DutyElectrical System5—Battery →
2020 Ford F-350 Super DutyPower Train5—
2020 Ford F-450 Super DutyElectrical System5—Battery →
2020 Ford MustangElectrical System5—Battery →
2019 Ford MustangElectrical System5—Battery →
2020 Ford RangerElectrical System5—Battery →
2019 Ford RangerElectrical System5—Battery →
2020 Lincoln AviatorElectrical System5—Battery →
2020 Lincoln ContinentalElectrical System5—Battery →
2019 Lincoln ContinentalEquipment5—
2020 Lincoln CorsairElectrical System5—Battery →

Showing the 25 model years where B156D appears most; it is on file for 84 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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B156D by make

The same record, one make at a time: the model years, bulletins and owner reports that name B156D on that maker’s vehicles.

Ford 61Lincoln 22

What it gets filed under

Electrical System 113 Equipment 81 Not specified 53 Power Train 15 Equipment Adaptive/Mobility 11

292 manufacturer filings name B156D. 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 B156D.

What B156D means

Source: SAE J2012 / OBD-II

B156D is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.

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 B156D

Source: NHTSA files and the OBD-II standard

Why does this page not define B156D?

Because it cannot be defined honestly. The second character of a trouble code says who owns its meaning, and a 1 or a 3 hands that to the manufacturer. Sites that print one definition for a manufacturer-specific code are showing you one automaker's meaning and hoping it is yours.

Can I keep driving with B156D 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.