Honda bulletin A21-084
Honda filed this with NHTSA as a service bulletin dated Dec 16, 2021, received Nov 2, 2021, about the engine and engine cooling — 2 documents under this number. It names 3 model years (2019–2021). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationService Bulletin - The MIL comes on with DTC P1F86 FC Cell Voltage Too Low (Caution).
Documents filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| A21-084 | Service bulletin | Dec 16, 2021 | 10205454 |
| A21-084 | Service bulletin | Oct 26, 2021 | 10202872 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. Quote it at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Honda A21-084 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the A21-084 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does A21-084 cover?
The manufacturer filed it against 3 model years: 2021 Honda Clarity, 2020 Honda Clarity, 2019 Honda Clarity. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.