# 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.

- Type: Service bulletin
- NHTSA id: 10127645
- Published by NHTSA: 2018\-02\-05
- Manufacturer's number: Service Bulletin
- Manufacturer's date: 2014\-08\-30
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

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. Amrican 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 through P0304 and cause the MIL to come on.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10127645-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10127645-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Trouble codes named

P0301, P0304

## Vehicles listed

- 2009 to 2013 HONDA PILOT

## Recalls for the same vehicles and component

- [13V382000](/recalls/nhtsa/13V382000.md), 2013-08-27: ENGINE

## Other bulletins for the same vehicles and component

- [A26\-002](/bulletins/11028516.md), 2026-02-06, Service bulletin: ENGINE. Service Bulletin \- The piston ring function deteriorates due to ring low wear toughness and sticking from sludge. Oil adheres to the spark plug leading to carbon fouling and misfire. 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.
- [A25\-060](/bulletins/11022767.md), 2025-09-05, Service bulletin: ENGINE. Service Bulletin \- The piston ring function deteriorates due to ring wear and sticking from sludge. Oil from the crankcase adheres to the spark plug leading to carbon fouling and misfire. 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.
- [ONL6Z6072025](/bulletins/11021759.md), 2025-08-08, Other: ENGINE. Owner Notification Letter \- the piston ring function can deteriorate due to ring low wear toughness and sticking from sludge. Oil adheres to the spark plug leading to carbon fouling and misfire. 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 Malfunction Indicator Lamp \(MIL\) to come on.
- [A25\-060](/bulletins/11020824.md), 2025-07-23, Service bulletin: ENGINE. Service Bulletin \- The piston ring function deteriorates due to ring low wear toughness and sticking from sludge. Oil adheres to the spark plug leading to carbon fouling and misfire. 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.
- [AEBM06172025901](/bulletins/11020087.md), 2025-07-02, Other: ENGINE. Dealer Message \- Piston ring effectiveness may be reduced due to excessive wear and oil sludge build\-up, which can cause oil to adhere to the spark plug, potentially leading to carbon fouling and misfire triggering DTCs P0301 through P0304 and cause the MIL to come on.
- [A25\-060](/bulletins/11020084.md), 2025-07-02, Service bulletin: ENGINE. Service Bulletin \- The piston ring function deteriorates due to ring low wear toughness and sticking from sludge. Oil adheres to the spark plug leading to carbon fouling and misfire.
- [A13\-082](/bulletins/10216874.md), 2022-08-02, Service bulletin: FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. "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."
- [DOR\-M9J4S\-07](/bulletins/10177599.md), 2020-07-27, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB standards, but parts on vehicles are not effected.
- [DOR\-M3J3F\-07](/bulletins/10177598.md), 2020-07-27, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB standards, but parts on vehicles are not effected.
- [A20\-023](/bulletins/10172366.md), 2020-03-11, Service bulletin: ENGINE AND ENGINE COOLING. Service Bulletin \- The front rocker arm oil control valve is leaking.

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