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February 1, 2026 Service bulletin

The piston ring function deteriorates due to ring low wear toughness and sticking from sludge

Honda technical service bulletin A26-001 for 2013-2017 Honda Odyssey.

Bulletin number
A26-001
Component
Engine
Summary
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.

Owners of these vehicles have filed 294 complaints in the engine category.

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