U0101 on Buick vehicles A module has stopped hearing from the transmission control module
U0101 is named on 8 Buick model years (2016–2017): 13 manufacturer filings and 1 owner report in NHTSA’s files, across Verano, Cascada, Encore, LaCrosse, Regal.
Which Buick model years name U0101
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2016 Buick Verano | Engine | 2 | 1 |
| 2016 Buick Cascada | Engine | 2 | — |
| 2016 Buick Encore | Engine | 2 | — |
| 2016 Buick LaCrosse | Engine | 2 | — |
| 2016 Buick Regal | Power Train | 2 | — |
| 2017 Buick Cascada | Equipment | 1 | — |
| 2017 Buick Encore | Equipment | 1 | — |
| 2017 Buick Verano | 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.
Buick filings that name U0101
Source: NHTSA manufacturer communicationsBulletins and campaigns Buick filed with NHTSA whose summary names U0101. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP4990C Service bulletin2016-02-11 · Engine
- THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT SOME VEHICLES MAY HAVE A SERVICE ENGINE SOON THAT COMES ON. TECHNICIAN MAY FIND A DIAGNOSTIC TROUBLE CODE U0101 CURRENT OR STORED HISTORY. TECHNICIAN SO CHECK TERMINAL PIN FIT AT TRANSMISSION CONNECTOR, UNDER HOOD FUSE BLOCK. ALSO THE TRANSMISSION CONTROL MODULE GROUND WILL NEED TO BE INSPECTED. TECHNICIAN WILL REVIEW THE APPRO
- PIP4990D Service bulletin2017-02-23 · Equipment — Other — Owners/Service/Other Manual
- This Preliminary Information communication provides information to the technician about vehicles with the service engine soon lamp that comes on. Technician may find Diagnostic Trouble Code U0101. Technician should review the appropriate Service Information diagnostics for DTC U0101. Also gather all other diagnostic trouble codes in the vehicle and which modules they are set in. The transmission c
What U0101 means
Source: SAE J2012 / OBD-IIA module has stopped hearing from the transmission control module.
A stored code names the test that failed, never the part that caused it. The record above is what Buick 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 U0101 a known problem on Buick vehicles?
It is a documented one: NHTSA's files hold 13 manufacturer filings and 1 owner report naming U0101 on 8 Buick model years (2016–2017). 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 Buick models does U0101 appear on most?
2016 Verano (3 documents), 2016 Cascada (2 documents), 2016 Encore (2 documents).
Does U0101 on a Buick 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.