P2459 on Ram vehicles
P2459 is named on 5 Ram model years (2022–2024): 12 manufacturer filings and 5 owner reports in NHTSA’s files, across 2500, 3500.
Which Ram model years name P2459
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2022 Ram 2500 | Engine | 3 | 2 |
| 2022 Ram 3500 | Not specified | 3 | 2 |
| 2023 Ram 2500 | Not specified | 3 | — |
| 2023 Ram 3500 | Not specified | 3 | — |
| 2024 Ram 3500 | Power Train | — | 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 Ram 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.
The primary symptom is an illuminated check engine light accompanied by diagnostic trouble code P2459 (Diesel Particulate Filter Regeneration Frequency)
The check engine light comes on frequently, and diagnostic scans consistently show code P2459 (Diesel Particulate Filter Regeneration Frequency Too High)
Ram filings that name P2459
Source: NHTSA manufacturer communicationsBulletins and campaigns Ram filed with NHTSA whose summary names P2459. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 25-005-24 Service bulletin2024-09-27 · Engine
- "Diesel Particulate Filter (DPF) Trying To Regen Too Frequent Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: ● Vehicle has entered engine performance de-rate mode. NOTE:
- 25-005-24 REV. A Service bulletin2024-10-24 · Unknown Or Other
- "Diesel Particulate Filter (DPF) Trying To Regen Too Frequent Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: ● Vehicle has entered engine performance de-rate mode. NOTE: Engine performanc
- 25-005-24 REV. B Service bulletin2024-10-26 · Unknown Or Other
- "Diesel Particulate Filter (DPF) Trying To Regen Too Frequent Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): ● P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: ● Vehicle has entered engine performance de-rate mode. NOTE: Engine performanc
What P2459 means
Source: SAE J2012 / OBD-IIP2459 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 Ram 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 P2459 a known problem on Ram vehicles?
It is a documented one: NHTSA's files hold 12 manufacturer filings and 5 owner reports naming P2459 on 5 Ram model years (2022–2024). 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 Ram models does P2459 appear on most?
2022 2500 (5 documents), 2022 3500 (5 documents), 2023 2500 (3 documents).
Does P2459 on a Ram 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.