U211B
0 owner reports and 87 manufacturer filings across 27 model years from Ford, Lincoln.
Where U211B shows up
Source: NHTSA manufacturer communications and complaintsA 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 U211B. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- SSM 549162026-06-11 · Electrical System
- Some 20242026 Nautilus vehicles may have previously exhibited unsuccessful programmable module installation (PMI) starting with a CallGetRestore Invalid hardware error message, when using the Ford Diagnosis and Repair System (FDRS) to program a new door latch control module E (DCME), door latch control module F (DCMF), door latch control module G (DCMG), and/or door latch control module H (DCMH
- SSM 537592025-05-12 · Unknown Or Other
- After replacement of any TRON module, the gateway module (GWM) and the TRON capable modules can set diagnostic trouble codes (DTCs) U211A, U211B, U211C, U3034, U3035, U3036, U35D9, U35DA and/or U35DB if the secret authentication security keys are not aligned between the modules, a loss of communication is occurring between modules and/or a module is not responding. This may be a result of missing
- SSM 536382025-04-14 · Unknown Or Other
- After replacement of any TRON module, the gateway module (GWM) and the TRON capable modules can set diagnostic trouble codes (DTCs) U211A, U211B, U211C, U3034, U3035, U3036, U35D9, U35DA and/or U35DB if the secret authentication security keys are not aligned between the modules, a loss of communication is occuring between modules and/or a module is not responding. This may be a result of missing t
- TSB 25-21412025-04-11 · Unknown Or Other
- Some of the vehicles listed in the Model statement above may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) U1027:00 stored in the secondary on-board diagnostic control module C (SOBDMC) and DTCs U211B:08, U0100:00 and U023A:00 stored in the anti-lock brake system (ABS) module. This may be due to the software in the ABS module.
- SSM 527992024-08-14 · Unknown Or Other
- Some 2024 F-150 vehicles may exhibit diagnostic trouble code (DTC) U211B:87 in the headlamp control module (HCM) when a diagnostic self-test is performed.
- SSM 527592024-07-30 · Unknown Or Other
- Some 2025 Explorer/Aviator/Police Interceptor Utility vehicles may set diagnostic trouble code (DTC) U211B:87 in the headlamp control module (HCM) when a diagnostic self-test is performed. This may be due to a HCM communication error within a specified timeframe. DTC U211B:87 does not affect vehicle durability with no effect on vehicle operation and no additional diagnostics or service is required
What U211B means
Source: SAE J2012 / OBD-IIU211B 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 U211B
Source: NHTSA files and the OBD-II standardCan I keep driving with U211B 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.