P27B4
1 owner report and 16 manufacturer filings across 5 model years from Ford.
Where P27B4 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2020 Ford F-250 Super Duty | Electrical System | 5 | — |
| 2020 Ford F-350 Super Duty | Electrical System | 5 | — |
| 2020 Ford F-450 Super Duty | Power Train | 5 | — |
| 2022 Ford E-Transit | Fuel/Propulsion System | 1 | — |
| 2023 Ford Edge | Fuel/Propulsion 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.
This total electronic communication breakdown immediately triggered an un-commanded cascade of secondary transmission performance faults, specifically P0751 (shift solenoid A Stuck off) and P2700, P2701, P2704, P27B2, P27B4 (transmission…
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P27B4. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- TSB 25-23432025-07-25 · Fuel/Propulsion System
- This article supersedes TSB 22-2491 to update labor times from M-time to AP-time and add a cap. Some of the vehicle listed in the model statement above may exhibit at least one of the following conditions: - Illuminated red triangle with diagnostic trouble code (DTC) P27B4 stored in the secondary on-board diagnostic module C (SOBDMC) - Charge Status Indicator (CSI) is blinking red with DTC P0A7F s
- TSB 20-23362020-09-22 · Engine And Engine Cooling
- Some 2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 19-Aug-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0300-P0308, P0603, P203B, P208B, P208C, P2201, P24C2, P27B4, P07F6 and/or P27B5 stored in the powertrain control module (PCM). The vehicle may also exhibit a forced idle condition. This may be due to various stra
- TSB 20-20742020-03-12 · Power Train
- Some 2020 F-Super Duty vehicles equipped with a 6.2L/7.3L gas engine and 10R140 transmission built on or before 5-Dec-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P27B4 stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogra
- TSB-20-20632020-03-05 · Electrical System
- Some 2020 F-Super Duty vehicles equipped with a 6.7L engine built on or before 5-Feb-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P203B, P2201 and/or DTC P27B4 stored in the powertrain control module (PCM). The vehicle may also exhibit a forced idle condition. This may be due to various strategies within the PCM software. To correct the condi
What P27B4 means
Source: SAE J2012 / OBD-IIP27B4 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.
Common questions about P27B4
Source: NHTSA files and the OBD-II standardCan I keep driving with P27B4 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.