P2004 on Subaru vehicles
P2004 is named on 8 Subaru model years (2016–2021): 7 manufacturer filings and 2 owner reports in NHTSA’s files, across Crosstrek, Forester, WRX.
Which Subaru model years name P2004
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2021 Subaru Crosstrek | Vehicle Speed Control | — | 2 |
| 2019 Subaru WRX | Structure | 1 | — |
| 2018 Subaru Forester | Equipment | 1 | — |
| 2018 Subaru WRX | Equipment | 1 | — |
| 2017 Subaru Forester | Equipment | 1 | — |
| 2017 Subaru WRX | Equipment | 1 | — |
| 2016 Subaru Forester | Equipment | 1 | — |
| 2016 Subaru WRX | Equipment | 1 | — |
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 Subaru 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.
Sixteen trouble codes were stored, including P26A6, P0606, P060B, P2138, P2135, P2122, P2119, P2004, P2005, and P0191
Subaru filings that name P2004
Source: NHTSA manufacturer communicationsBulletins and campaigns Subaru filed with NHTSA whose summary names P2004. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 02-182-19 Service bulletin2019-05-28 · Equipment
- This Service Information bulletin announces a design change made to the TGV assemblies used on the Forester Turbo models and WRXs listed above. Condensation resulting from EGR system operation may enter the area between the TGV shaft and bearing. Over time, corrosion can develop and impede movement of the TGV shaft and cause any of the DTCs P2004, 2005, 2006 and /or P2007 to set. The material of t
What P2004 means
Source: SAE J2012 / OBD-IIP2004 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 Subaru 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 P2004 a known problem on Subaru vehicles?
It is a documented one: NHTSA's files hold 7 manufacturer filings and 2 owner reports naming P2004 on 8 Subaru model years (2016–2021). 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 Subaru models does P2004 appear on most?
2021 Crosstrek (2 documents), 2018 Forester (1 document), 2017 Forester (1 document).
Does P2004 on a Subaru 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.