U1A01 on Nissan vehicles
U1A01 is named on 7 Nissan model years (2018): 7 manufacturer filings and 0 owner reports in NHTSA’s files, across Altima, Armada, Maxima, Murano, Pathfinder and 2 more.
Which Nissan model years name U1A01
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 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 is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Nissan filings that name U1A01
Source: NHTSA manufacturer communicationsBulletins and campaigns Nissan filed with NHTSA whose summary names U1A01. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 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. The record above is what Nissan and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs U1A01 a known problem on Nissan vehicles?
It is a documented one: NHTSA's files hold 7 manufacturer filings and 0 owner reports naming U1A01 on 7 Nissan model years (2018). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Nissan models does U1A01 appear on most?
2018 Altima (1 document), 2018 Armada (1 document), 2018 Maxima (1 document).
Does U1A01 on a Nissan mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.