P228C on Buick vehicles

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 P228C. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5385C Service bulletin
  2017-01-31 · Fuel System, Gasoline
• This Preliminary Information communication advises the technician on the steps to diagnose the concern, and the steps to repair the concern of Diagnostic Trouble Code P228C setting. The technician is to inspect the fuel and readings for the High Pressure Fuel Pump. The technician is to drain and clean fuel tank and all lines if contamination is found. The technician is to replace the high pressure
• PIP5385 Service bulletin
  2016-03-22 · Fuel System, Gasoline
• This Preliminary Information communication provides information to the technician with the steps to diagnose and repair vehicles that may have Service Engine Soon lamp or reduced engine power message came on and was cleared after cycling the key. Also technician may find a P228C set as current or history, and a prior history of High Pressure Fuel Pump replacement, and the customer has been using E
• PIP5385D Service bulletin
  2018-01-31 · Fuel System, Gasoline
• This Preliminary Information communication advises the technician on the steps to diagnose the concern, and the steps to repair the concern of Diagnostic Trouble Code P228C setting. The technician is to inspect the fuel and readings for the High Pressure Fuel Pump. The technician is to drain and clean fuel tank and all lines if contamination is found. The technician is to replace the high press
• 18NA072 Service bulletin
  2018-04-13 · Fuel System, Gasoline
• This technical bulletin provides a procedure to inspect the fuel system and replace the high pressure fuel pump if faulty for a Reduced Engine Power, MIL On, DTC P228C condition.
• 18NA072 Service bulletin
  2020-03-04 · Equipment
• This technical bulletin provides a procedure to inspect the fuel system and replace the high pressure fuel pump if faulty for a Reduced Engine Power, MIL On, DTC P228C condition.
• PIP6061 Service bulletin
  2025-05-01 · Fuel/Propulsion System
• This Preliminary information communicates there could be an electrical connection concerns at the high pressure fuel pump, and may set any combnation of diagnostic trouble codes, P0089 P0090 P00C6 P163A and / or P228C.  The technician should inspect the terminals and manipulate the harness to see if any of the codes can be duplicated. Replace or repair connector or terminals as needed.

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.