P2097 on Buick vehicles After the catalyst, the mixture on bank 1 is reading rich

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.

Bulletins and campaigns Buick filed with NHTSA whose summary names P2097. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP4964D Service bulletin
  2019-06-18 · Fuel System, Gasoline
• This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P2097 or P2099. Technician will need to perform an injector balance or Active Fuel Injector Tester prior to going further. Technician will also need to check for a small leak in the exhaust if pu
• PIP4964E Service bulletin
  2023-10-16 · Electronic Stability Control — Automatic (Asc)
• This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P2097 or P2099. Technician will need to perform an injector balance or Active Fuel Injector Tester prior to going further. Technician will also need to check for a small leak in the exhaust if pu
• PIP4964F Service bulletin
  2025-05-29 · Unknown Or Other
• This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P2097 or P2099. Technician will need to perform an injector balance or Active Fuel Injector Tester prior to going further. Technician will also need to check for a small leak in the exhaust if pu
• PIP5534 Service bulletin
  2017-11-30 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary information communicates additional diagnostics to assist the dealer technician with diagnosing and repairing trouble code P2097.
• PIP5534A Service bulletin
  2018-10-09 · Engine
• This Preliminary information communicates additional diagnostics to assist the dealer technician with diagnosing and repairing trouble code P2097.

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.