Service bulletin Service Bulletin

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10129528
Published by NHTSA	2018-03-05
Manufacturer's number	Service Bulletin
Manufacturer's date	2014-02-26
NHTSA component	ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM

NHTSA's 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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine

Trouble codes named

P0301, P0304

Vehicles listed
HONDA ACCORD	2008, 2009, 2010, 2011, 2012

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
11V004000	2011-01-06. ELECTRICAL SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
A21120A	2023-06-21. Service bulletin. Service News - The navigation clock and date are incorrect. This is due to a limited GPS receiver Capacity resulting in rollover of the internal chip memory; the rollover occurred on January 1, 2022, at 12:00AM local time.
A21120A	2022-02-04. Service bulletin. ServiceNews Article - The clock shows the incorrect time. This issue is due to a limited GPS receiver capacity resulting in "rollover" of the internal chip memory; the "rollover" will occur on January 1, 2022, at 12:00AM local time. As a result, once specific triggers are met, the navigation date and time will be incorrect.
SB09010 ver3	2021-12-13. Service bulletin. Engine Rattles at Cold Start-Up Supersedes 09-010, dated March 3, 2015 to revise the information highlighted in yellow.
SB09010 ver4	2021-12-13. Service bulletin. Engine Rattles at Cold Start-Up Supersedes 09-010, dated March 3, 2015 to revise the information highlighted in yellow.
A20-023	2020-03-11. Service bulletin. Service Bulletin - The front rocker arm oil control valve is leaking.
A13-079	2019-01-05. Service bulletin. "Service bulletin - American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned, Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.). The piston rings on certain cylinders may rotate and align, which can lead to spark plug fouling. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on. American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs P0301 through P0304) to 8 years with unlimited mileage from the original date of purchase and has settled a class action based on this remedial measure."
A13-078	2019-01-05. Service bulletin. "Service bulletin - American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned, Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.). The piston rings on certain cylinders may rotate and align, which can lead to spark plug fouling. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on. American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs P0301 through P0304) to 8 years with unlimited mileage from the original date of purchase and has settled a class action based on this remedial measure."
A12-087	2019-01-05. Service bulletin. "Service bulletin - American Honda is extending the warranty coverage on the Piston Rings and Pistons for 2008-11 Accord L4 to 8 years from the original date of purchase or 125,000 miles, whichever comes first. The warranty extension does not apply to any vehicle that has ever been declared a total loss or sold for salvage by a financial institution or insurer, or has a branded, or similar tittle under any state's law."
A18070	2018-09-04. Service bulletin. Service bulletin - Emission certification labels that were replaced on a small number of vehicles may have been replaced with a label listing incorrect information. The affected emission labels are replacement service parts, and were not installed at the factory; they were installed during postmanufacturing repairs that required replacement of the underlying part. This will cause the vehicle to be non-compliant with emissions regulations.
Service Bulletin	2018-07-16. Service bulletin. Service bulletin - One or both A/F Sensor 1 (Air Fuel Ratio) caps may have fallen off and bored a hole through the affected WU-TWC (Warm Up Three Way Catalyst).