WenmarOpen by Wenmar Pro

Service bulletins for the 2018 Honda Clarity

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.

46 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
A18-0902023-11-29. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3 (electric water valve malfunction), DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). There are up to three updates that must be performed on applicable vehicles.
A21-0082021-02-18. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING. Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored.
ONL6VT032620192019-04-06. Service bulletin. ENGINE AND ENGINE COOLING; VISIBILITY; POWER TRAIN. Owner Notification Letter - On Clarity Plug-in Hybrid vehicles, there may be a software problem in the powertrain control module (PCM), causing a malfunction indicator light to come on and store one or more diagnostic trouble codes (DTCs).
A18-0792018-07-30. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction).

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.