This bulletin applies to 2001-2013 Chevy Corvette models. You may encounter a SES lamp and a misfire condition, with DTC P0301-P0308 or P0300 only (random misfires on random cylinders).
Some 2011-2013 Ford F-Super Duty vehicles equipped with the 6.7L diesel engine may exhibit a runs rough/misfire condition only during the exhaust regeneration process. This condition typically occurs on light throttle tip-in between 40-70 mph and will not set a DTC. The concern may be intermittent and a knocking noise may be present during the concern.
Some 2011-2012 Ford F-Super Duty vehicles equipped with a 6.7L diesel engine built on or before 2-12-12 may exhibit a run-rough and/or misfire concern with or without DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308.
This bulletin applies to 2001-2013 Chevy Corvettes that exhibit random misfires on random cylinders, with DTCs P0301-P0308 or P0300 only.
This bulletin applies to 2014 Dodge Durango and Jeep Grand Cherokee vehicles equipped with a 3.0L engine, built on or before Jan. 21, 2014, or a 3.6L engine or 5.7L engine built on or before March 10, 2014.
Some 2006-2010 Lexus IS250 vehicles may exhibit one or more of the following conditions:
Some owners of 2007-2014 Cadillac Escalades, Chevy Avalanche, Silverado, Suburban or Tahoe, GMC Sierra or Yukon or Hummer H2 vehicles may complain of an SES light and constant engine misfire. In some cases, they may also complain of an engine tick/knock noise.
Some owners of 2010-2011 Buick LaCrosse vehicles equipped with a 3.6L V6 engine built prior to VIN BF358708 may comment that the MIL is illuminated within the first 60 seconds of operation after a cold start. A revised calibration has been developed to address this condition. No driveability concern is present, and the technician may find DTC P0300 through P0306 (random misfire counts).
This bulletin applies to 2010 Audi R8 models. The MIL may be on, accompanied by a high engine speed misfire. DTC P0300 and/or P3001-P0310 may be stored in the ECM.
I enjoy working through diagnostics, with my favorite being driveability concerns. The most common diagnostics that I perform relate to check engine lights, and lately some of those have been very challenging.