P04F1 on Honda vehicles
P04F1 is named on 7 Honda model years (2017–2022): 22 manufacturer filings and 3 owner reports in NHTSA’s files, across CR-V, Pilot.
Which Honda model years name P04F1
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 Honda CR-V | Electrical System | 4 | 1 |
| 2021 Honda CR-V | Engine | 4 | — |
| 2020 Honda CR-V | Electrical System | 4 | — |
| 2019 Honda CR-V | Electrical System | 4 | — |
| 2017 Honda CR-V | Engine | 4 | — |
| 2022 Honda CR-V | Engine | 2 | — |
| 2019 Honda Pilot | Fuel/Propulsion System | — | 2 |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
What Honda owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
My engine light came on, and the codes reported were P0441 P04F1 U0401 and P0172
Honda filings that name P04F1
Source: NHTSA manufacturer communicationsBulletins and campaigns Honda filed with NHTSA whose summary names P04F1. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- A21-081 Service bulletin2021-10-26 · Engine And Engine Cooling
- Service Bulletin - The MIL comes on with DTCs P0441 (EVAP System Purge Flow Malfunction) P04F1 (EVAP System Low Purge Flow Detected).
- A21-081 Service bulletin2021-11-04 · Electrical System
- Service Bulletin - The MIL comes on with DTCs P0441 (EVAP System Purge Flow Malfunction) P04F1 (EVAP System Low Purge Flow Detected).
- A21-081 Service bulletin2021-11-13 · Electrical System
- Service Bulletin - The MIL comes on with DTCs P0441 (EVAP System Purge Flow Malfunction) P04F1 (EVAP System Low Purge Flow Detected).
What P04F1 means
Source: SAE J2012 / OBD-IIP04F1 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Honda and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P04F1 a known problem on Honda vehicles?
It is a documented one: NHTSA's files hold 22 manufacturer filings and 3 owner reports naming P04F1 on 7 Honda model years (2017–2022). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Honda models does P04F1 appear on most?
2018 CR-V (5 documents), 2021 CR-V (4 documents), 2020 CR-V (4 documents).
Does P04F1 on a Honda mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.