U2101
0 owner reports and 28 manufacturer filings across 14 model years from Ford, Lincoln.
Where U2101 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Ford Fiesta | Electrical System | 4 | — |
| 2016 Ford Fiesta | Electrical System | 4 | — |
| 2023 Ford F-250 Super Duty | Electrical System | 3 | — |
| 2023 Ford F-350 Super Duty | Electrical System | 3 | — |
| 2023 Ford F-450 Super Duty | Electrical System | 3 | — |
| 2018 Ford Fiesta | Electrical System | 2 | — |
| 2016 Lincoln MKZ | Equipment | 2 | — |
| 2021 Ford EcoSport | Electrical System | 1 | — |
| 2020 Ford EcoSport | Electrical System | 1 | — |
| 2019 Ford EcoSport | Electrical System | 1 | — |
| 2019 Ford Fiesta | Electrical System | 1 | — |
| 2021 Ford Transit Connect | Electrical System | 1 | — |
| 2020 Ford Transit Connect | Electrical System | 1 | — |
| 2019 Ford Transit Connect | 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
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U2101. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- SSM 540522025-07-15 · Steering
- Some 2023-2025 F-Super Duty vehicles may display an error during replacement of the SCCM that contains the following message: "Reprogramming has failed, would you like to retry?". If this error is present, the SCCM will not complete PMI and may store diagnostic trouble codes (DTC) U2100 and/or U2101 in the SCCM. This may be due to a concern with the compatibility of the software with a hardware ch
- SSM 516752023-06-01 · Electrical System — Body Control Module/Bcm
- Some 2023 F-Super Duty vehicles equipped with SYNC 4 may experience programming errors after a replacement of the body control module (BCM) for various concerns. After programmable module installation (PMI) of the new BCM, diagnostic trouble codes (DTC) U2100:00, U2101:00 and/or U211B:87 may be present. Download and run the Ford Diagnosis and Repair System (FDRS) application titled Trusted Real-Ti
- SSM 516642023-05-26 · Electrical System — Body Control Module/Bcm
- Some 2023 F-Super Duty vehicles equipped with SYNC 4 may require a replacement of the body control module (BCM) for various concerns. After programmable module installation (PMI) of the new BCM, diagnostic trouble codes (DTC) U2100:00, U2101:00 and/or U211B:87 may be present. Download and run the Ford Diagnosis and Repair System (FDRS) application titled Trusted Real-Time Operation Network (TRON)
- SSM 496902021-03-25 · Electrical System
- For 2018-2021 EcoSport/Expedition/Navigator, 2019-2021 Ranger/Transit Connect, 2020-2021 Escape/Explorer/SuperDuty/Transit/Aviator/Corsair, 2021 Bronco Sport/F-150/Mustang/Mach-E the Workshop Manual (WSM) diagnostics may direct to replace a module on vehicles that use Ford Diagnosis and Repair System (FDRS). First, an FDRS session must be created on the vehicle prior to removing the faulted module
- SSM 491302020-08-26 · Electrical System
- Some 2011-2019 Fiesta vehicles may exhibit various concerns following IPC replacement. Symptoms may include: no crank, 'Contact Hotline message', odometer displaying incorrect English or Metric units and/or diagnostic trouble code (DTC) U2101 in multiple modules. If programmable module installation (PMI) has been performed on the replacement IPC, disconnect the IPC, start a new session using the a
- SSM 474092018-07-12 · Electrical System
- Some 2011-2018 Fiesta vehicles may exhibit various concerns following IPC replacement. Symptoms may include: no crank, Contact Hotline message, odometer displaying incorrect English or Metric units and/or diagnostic trouble code (DTC) U2101 in multiple modules. If programmable module installation (PMI) has been performed on the replacement IPC, disconnect the IPC, start a new session using the a
What U2101 means
Source: SAE J2012 / OBD-IIU2101 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 U2101
Source: NHTSA files and the OBD-II standardCan I keep driving with U2101 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.