U1962
1 owner report and 28 manufacturer filings across 9 model years from Cadillac, Chevrolet, GMC.
Where U1962 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 Cadillac Escalade | Unknown Or Other | 6 | — |
| 2025 GMC Yukon | Unknown Or Other | 6 | — |
| 2025 Chevrolet Suburban | Unknown Or Other | 3 | — |
| 2025 Chevrolet Tahoe | Unknown Or Other | 3 | — |
| 2024 Chevrolet Traverse | Power Train | 3 | — |
| 2024 GMC Acadia | Electrical System | 3 | — |
| 2025 Chevrolet Corvette | Electrical System | 2 | — |
| 2024 Chevrolet Corvette | Engine | 2 | — |
| 2025 Chevrolet Traverse | Engine | — | 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
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are what was said, not a finding that it was true.
GM's own OnStar Diagnostic Telemetry automatically dispatched critical fault alerts while the vehicle was stranded, explicitly logging the following irrefutable failure codes: DTC U1962 (PCM - Engine and Transmission System): Warning…
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names U1962. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- PIT6281B2025-05-05 · Unknown Or Other
- This Preliminary information communicates an issue with an SES MIL and BCM DTC U1962 and ECM P00FF set. Dealers are to reprogram the BCM with the lastest calibrations.Â
- N242487960-01 Service campaign2025-05-05 · Unknown Or Other
- Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). Dealers are to reprogram the body control module.
- N242487960 Service campaign2025-02-03 · Electrical System
- Service Updated - Certain vehicles listed above may have a condition in which the Body Control Module (BCM) may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). Dealers are to reprogram the body control module.
- N242438530 Service campaign2025-01-29 · Engine
- Service Update. The Engine Control Module (ECM) in certain vehicles may not properly clear the DTC U1962 (Unable to Authenticate Serial Data Message). If a communications fault were to occur, the DTC will remain set with the Malfunction Indicator Light (Check Engine Light) illuminated even if the condition resolves. Clearing the DTC with a service tool will not clear the permanent status of the D
- PIT6281A2025-01-10 · Unknown Or Other
- This Preliminary information communicates an issue with an SES MIL and BCM DTC U1962 and ECM P00FF set. Dealers are to perform a clear DTC's and if necessary perform a Serial Data Authentication Configuration procedure to correct this issue.
- PIE0807A2024-11-15 · Engine
- This engineering information (EI) closure ends the need for requesting further information from technicians in regard to the Malfunction Indicator Lamp (MIL) illuminated on the Driver Information Center (DIC) with DTCs U0485, U1962 Set.
What U1962 means
Source: SAE J2012 / OBD-IIU1962 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 U1962
Source: NHTSA files and the OBD-II standardWhy does this page not define U1962?
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 U1962 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.