B1578
1 owner report and 29 manufacturer filings across 19 model years from Chrysler, Dodge, Ford, Lincoln and others.
Where B1578 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Ford Mustang Mach-E | Equipment | 4 | — |
| 2022 Ford Mustang Mach-E | Equipment | 3 | — |
| 2025 Chrysler Pacifica | Electrical System | 2 | — |
| 2024 Chrysler Pacifica | Electrical System | 2 | — |
| 2023 Chrysler Pacifica | Electrical System | 2 | — |
| 2022 Chrysler Pacifica | Electrical System | 2 | — |
| 2026 Dodge Charger | Electrical System | 2 | — |
| 2025 Dodge Charger | Electrical System | 2 | — |
| 2025 Chrysler Voyager | Electrical System | 1 | — |
| 2024 Chrysler Voyager | Electrical System | 1 | — |
| 2023 Chrysler Voyager | Electrical System | 1 | — |
| 2022 Chrysler Voyager | Electrical System | 1 | — |
| 2024 Dodge Charger | Electrical System | 1 | — |
| 2024 Ford Expedition | Unknown Or Other | 1 | — |
| 2023 Ford Mustang Mach-E | Unknown Or Other | 1 | — |
| 2024 Lincoln Corsair | Unknown Or Other | 1 | — |
| 2024 Lincoln Nautilus | Lane Departure | 1 | — |
| 2024 Lincoln Navigator | Unknown Or Other | 1 | — |
| 2017 Subaru Legacy/Outback | Electrical System | — | 1 |
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.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
These are the Subaru code defects from the dealer are B1578, B1401 and B1411
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names B1578. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 91007452025-12-15 · Electrical System
- B1578 DTC active (Audio Antenna Circuit Resistance Below Threshold) in LB production vehicles. Do not diagnose stored or active DTC unless there is a customer facing issue noted. A SOL will be released to give further information.
- 91007462025-12-15 · Electrical System
- B1578 DTC active (Audio Antenna Circuit Resistance Below Threshold) in LB production vehicles. Do not diagnose stored or active DTC unless there is a customer facing issue noted. A SOL will be released to give further information.
- 91007472025-12-15 · Electrical System
- B1578 DTC active (Audio Antenna Circuit Resistance Below Threshold) in LB production vehicles. Do not diagnose stored or active DTC unless there is a customer facing issue noted. A SOL will be released to give further information.
- TSB 25-23982025-08-27 · Service Brakes
- This article supersedes TSB 23-2021 to update the service procedure and labor times from M-time to AP-time and add a limit. Some of the vehicles listed in the Model statement above equipped with the rear view camera system only may exhibit the "Reverse Brake Assistance Not Available" message and diagnostic trouble code (DTC) B1578:78 stored in the image processing module A (IPMA) that cannot be cl
- SSM 530202024-10-05 · Unknown Or Other
- An intermittent black screen in the vehicle center display screen with a "Camera Is Unavailable. Please Contact Your Dealership." message in the instrument panel cluster (IPC) when the vehicle is in reverse and DTC B1578:89 stored in the image processing module A (IPMA) may be present on some of the following Ford and Lincoln vehicles: * 2024 F-150/F-Super Duty built on or before 08-Apr-2024 * 202
- SSM 521242023-12-08 · Lane Departure — Software
- Some 2024 Nautilus vehicles may exhibit diagnostic trouble code (DTC) B1578:89 in the image processing module A (IPMA) when a diagnostic self-test is performed. This may be due to an internal module chip reboot that will recover by itself. B1578:89 has no effect on functionality. Replacement or reprogramming of the IPMA will not resolve this condition. Engineering is currently working on a solutio
What B1578 means
Source: SAE J2012 / OBD-IIB1578 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.
Common questions about B1578
Source: NHTSA files and the OBD-II standardWhy does this page not define B1578?
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 B1578 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. 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.