Honda Accord 2008–2012 — technical service bulletin
Bulletin Service Bulletin · NHTSA communication 10129528 · issued Feb 26, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2008–2012
model years
5
vehicle entries
Official summary
Service bulletin - The piston rings on certain cylinders may rotate and align which can lead to spark plug fouling. This can set DTCs P0301 through P0304 and cause the MIL to come on.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.