U1962: owner reports and bulletins

Network / communication. We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got U1962 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

3 complaints filed with NHTSA mention U1962, 3 of them since 2015, across 3 different models. The component owners most often filed it under: engine.

Manufacturer service bulletins that name U1962

12 technical service bulletins and manufacturer communications filed with NHTSA mention U1962, from 4 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • CADILLAC ESCALADE (2025), bulletin 11011196: 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 …
  • CHEVROLET SUBURBAN 1500 (2025), bulletin 11011196: 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 …
  • GMC YUKON (2025), bulletin 11011196: 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 …
  • CHEVROLET TRAVERSE (2024), bulletin 11005309: This informational bulletin provides information for dealers/technicians on Powertrain Control Module Fails Key Provisioning/Serial Data Authentication Configuration and Sets DTC U1962.
  • GMC ACADIA (2024), bulletin 11005309: This informational bulletin provides information for dealers/technicians on Powertrain Control Module Fails Key Provisioning/Serial Data Authentication Configuration and Sets DTC U1962.
  • BRIGHTDROP ZEVO 400 (2024), bulletin 11008075: This service bulletin provides repair information to correct a dealer concern of DTC U1962 Unable to Authenticate Serial Data Message.

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.