P0300 on Buick vehicles Misfire detected, but not isolated to one cylinder

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 P0300. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5421 Service bulletin
  2016-09-02 · Engine
• THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY BE RUNNING ROUGH WITH A MALFUNCTION INDICATOR LAMP ON. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODE P0300 SET. TECHNICIAN WILL NEED TO PERFORM AN ENGINE COMPRESSION TESTING IN SERVICE INFORMATION. IF EXCESSIVE LEAKAGE TO THE CRANKCASE IS ISOLATED, CHECK PISTON AND CYLINDER WALL CONDITION. TECHN
• PIP5421 Service bulletin
  2016-09-30 · Engine
• THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT MAY BE RUNNING ROUGH WITH A MALFUNCTION INDICATOR LAMP ON. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODE P0300 SET. TECHNICIAN WILL NEED TO PERFORM AN ENGINE COMPRESSION TESTING IN SERVICE INFORMATION. IF EXCESSIVE LEAKAGE TO THE CRANKCASE IS ISOLATED, CHECK PISTON AND CYLINDER WALL CONDITION. TECHN
• PIP5353C Service bulletin
  2017-02-23 · Fuel System, Gasoline
• This Preliminary Information communication provides information to the technician about vehicles that may have a rough idle or misfire. Technician may find Diagnostic Trouble Code P0300 set in the Engine Control Module. Technician will need to utilize engine controls schematics to compare the Fuel Injector Control Circuit wire colors to determine if the wires are reversed. If this concern is found
• 18NA020 Service bulletin
  2019-02-19 · Engine And Engine Cooling
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• 18NA020 Service bulletin
  2019-03-19 · Engine And Engine Cooling
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• 18NA020 Service bulletin
  2019-05-15 · Engine And Engine Cooling
• This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227.
• PIP5628 Service bulletin
  2019-02-18 · Engine And Engine Cooling
• This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
• PIP4959G Service bulletin
  2017-12-11 · Engine And Engine Cooling
• This Preliminary Information communication provides information to the technician with information regarding high misfire rates always on #1 cylinder. A customer may complain of misfires or roughness on cold start up with a P0300 diagnostic trouble code. Technician is to add coolant dye to the system and run the engine through warm up to circulate the dye. Pressurize the cooling system after a col
• 18NA115 Service bulletin
  2018-04-13 · Engine And Engine Cooling
• This Bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
• PIP4959F Service bulletin
  2017-08-23 · Engine And Engine Cooling
• This Preliminary Information communication provides information to the technician with information regarding high misfire rates always on #1 cylinder. A customer may complain of misfires or roughness on cold start up with a P0300 diagnostic trouble code. Technician is to add coolant dye to the system and run the engine through warm up to circulate the dye. Pressurize the cooling system after a col
• PIE0391 Service bulletin
  2017-01-13 · Engine
• This engineering information bulletin is requesting information from the field on vehicles that have the condition of Engineering Information — Repeat Malfunction Indicator Lamp (MIL) on with DTC P0300 (Engine Misfire Detected)
• PIP5628B Service bulletin
  2020-05-21 · Engine
• This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D

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.