U1A01
0 owner reports and 17 manufacturer filings across 13 model years from Ford, Infiniti, Lincoln, Nissan.
Where U1A01 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports | Parts |
|---|---|---|---|---|
| 2022 Ford Edge | Not specified | 2 | — | |
| 2021 Ford Edge | Electrical System | 2 | — | Battery → |
| 2022 Lincoln Nautilus | Not specified | 2 | — | |
| 2021 Lincoln Nautilus | Not specified | 2 | — | |
| 2018 Infiniti QX60 | Electrical System | 1 | — | Battery → |
| 2018 Infiniti QX80 | Electrical System | 1 | — | Battery → |
| 2018 Nissan Altima | Equipment | 1 | — | |
| 2018 Nissan Armada | Equipment | 1 | — | |
| 2018 Nissan Maxima | Equipment | 1 | — | |
| 2018 Nissan Murano | Equipment | 1 | — | |
| 2018 Nissan Pathfinder | Equipment | 1 | — | |
| 2018 Nissan Rogue | Equipment | 1 | — | |
| 2018 Nissan Titan | Equipment | 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.
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U1A01 by make
The same record, one make at a time: the model years, bulletins and owner reports that name U1A01 on that maker’s vehicles.
What it gets filed under
17 manufacturer filings name U1A01. Start with what the maker wrote down.
A code names the test that failed, not the part. A bulletin that names it is often a diagnosis someone has already written down — quote its number at the service desk.
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U1A01.
- SSM 50829 Service bulletin2022-06-06 · Equipment
- 2021-2022 various Ford and Lincoln vehicles may exhibit an erroneous diagnostic trouble code (DTC) U1A01:93 stored in the telematics control unit (TCU). This may be due to various software parameters within the TCU. If this DTC is identified during normal diagnostics, but the vehicle does not exhibit any customer concerns around the TCU operation, clear this DTC and no further repairs are recommen
- SSM 50473 Service bulletin2022-02-07 · Unknown Or Other
- 2021-2022 various Ford and Lincoln vehicles may exhibit an erroneous diagnostic trouble code (DTC) U1A01:93 stored in the telematics control unit (TCU). This may be due to various software parameters within the TCU. If this DTC is identified during normal diagnostics, but the vehicle does not exhibit any customer concerns around the TCU operation, clear this DTC and no further repairs are recommen
- ITB18-011 Service bulletin2018-03-09 · Electrical System — Software
- INFINITI; MICROPHONE DOES NOT WORK IF YOU CONFIRM The microphone of an applied vehicle does not work. - The person receiving your call through Bluetooth® cannot hear you. And Voice Recognition does not respond to any commands. NOTE: DTCs U1A01 and/or U1A02 may be found stored. ACTION 1. Confirm TCU reprogramming will resolve the issue. - Refer to ?Issue Confirmation? on page 2. 2. If c
- NTB18-023 Service bulletin2018-03-09 · Equipment — Electrical
- NISSAN; MICROPHONE DOES NOT WORK This bulletin applies only to vehicles equipped with Telematics. IF YOU CONFIRM The microphone of an applied vehicle does not work. - The person receiving your call through Bluetooth® cannot hear you. And Voice Recognition does not respond to any commands. NOTE: DTCs U1A01 and/or U1A02 may be found stored. ACTION 1. Confirm TCU reprogramming will resol
What U1A01 means
Source: SAE J2012 / OBD-IIU1A01 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 U1A01
Source: NHTSA files and the OBD-II standardWhy does this page not define U1A01?
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 U1A01 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light means a fault was logged and the car should be checked soon; a flashing light means a severe misfire — slow down and get it seen as soon as possible, because severe misfire can quickly damage the catalytic converter. 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.