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Diagnostic trouble code · Ford

B1578 on Ford vehicles

B1578 is named on 5 Ford model years (2021–2024): 9 manufacturer filings and 1 owner report in NHTSA’s files, across Mustang Mach-E, Expedition.

Body 5 model years 9 manufacturer filings 1 owner report

Which Ford model years name B1578

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 Ford Mustang Mach-EElectrical System4—
2022 Ford Mustang Mach-EEquipment3—
2024 Ford ExpeditionNot specified1—
2024 Ford Mustang Mach-EForward Collision Avoidance—1
2023 Ford Mustang Mach-ENot specified1—

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Not specified 4 Electrical System 2 Equipment 2 Forward Collision Avoidance 1

What Ford owners said

Source: NHTSA complaint database

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Visit 1, July 29-August 10, 2026, in at 34,296 miles, repair order 240919: dealer found IPMA camera diagnostic codes B1385:68, B1385:82, and B1578:89, cleaned the camera area, and updated IPMA software under warranty
2024 Ford Mustang Mach-E Oct 20, 2026 NHTSA owner report

Ford filings that name B1578

Source: NHTSA manufacturer communications

Bulletins and campaigns Ford filed with NHTSA whose summary names B1578. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What B1578 means

Source: SAE J2012 / OBD-II

B1578 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. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.

From here

Common questions

Source: NHTSA files and the OBD-II standard

Is B1578 a known problem on Ford vehicles?

It is a documented one: NHTSA's files hold 9 manufacturer filings and 1 owner report naming B1578 on 5 Ford model years (2021–2024). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.

Which Ford models does B1578 appear on most?

2021 Mustang Mach-E (4 documents), 2022 Mustang Mach-E (3 documents), 2024 Expedition (1 document).

Does B1578 on a Ford mean it is recalled?

No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.