TSB A21-007 — Honda Service bulletin
A21-007 is a service bulletin on file with NHTSA for the Honda Fit, 2015–2020 model years, filed and re-filed as 7 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Service Bulletin - The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected) due to carbon buildup on the intake valves may be affecting combustion.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years A21-007 names
Every document filed under A21-007
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| A21-007 | June 2, 2023 | Service bulletin |
| A21-007 | June 1, 2022 | Service bulletin |
| A21-007 | February 18, 2022 | Service bulletin |
| A21-007 | December 15, 2021 | Service bulletin |
| A21-007 | June 18, 2021 | Service bulletin |
| A21-007 | May 14, 2021 | Service bulletin |
| A21-007 | April 30, 2021 | Service bulletin |
What A21-007 covers
Engine, Fuel system, Electrical, Transmission & drivetrain — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB A21-007?
A21-007 is a service bulletin filed with NHTSA by Honda, covering the Honda Fit across the 2015–2020 model years. NHTSA's summary reads: Service Bulletin - The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected) due to carbon buildup on the intake valves may be affecting combustion.
Which vehicles does A21-007 cover?
NHTSA's file names Honda Fit (2015–2020). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB A21-007 a recall, and is the repair free?
No. A21-007 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of A21-007?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under A21-007, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under A21-007. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.