P2459
5 owner reports and 166 manufacturer filings across 41 model years from Cadillac, Chevrolet, Ford, GMC and others.
Where P2459 shows up
Source: NHTSA manufacturer communications and complaintsA model year appears here because the code is named in its record, not because every one of these vehicles sets it. Counts are mentions in the federal files, not failure rates — nobody publishes the denominator.
What it gets filed under
What owners said
Source: NHTSA complaint databaseOwners’ own words, one per nameplate, scrubbed of anything identifying. These are unverified reports filed with NHTSA — they are 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)
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P2459. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 25-005-24 REV. B2024-10-26 · 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): â—� P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: â—� Vehicle has entered engine performance de-rate mode. NOTE: Engine perfor
- 25-005-24 REV. A2024-10-24 · 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): â—� P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: â—� Vehicle has entered engine performance de-rate mode. NOTE: Engine perfor
- 25-005-242024-09-27 · 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): â—� P2459 - Diesel Particulate Filter Regeneration Too Frequent. Customers may also experience the following: â—� Vehicle has entered engine performance de-rate mode. NO
- 24-NA-1972024-09-19 · Engine
- This technical bulletin provides a procedure to correct the condition of Malfunction Indicator Lamp Illuminated with DTCs P2463 P2459 P11FB P11D3.
- 22-NA-1282024-08-09 · Fuel/Propulsion System
- This technical bulletin provides a procedure to test the intake manifold for any possible leaks that may cause the customers concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0172, P026D, P2459, and/or P2A00 Set.
- 22-NA-1282024-05-30 · Engine
- This technical bulletin provides a procedure to test the intake manifold for any possible leaks that may cause the customers concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0172, P026D, P2459, and/or P2A00 Set.
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. It is the starting point of a diagnosis, not its conclusion — the same code has several possible causes and the cheap one is not always right.
Common questions about P2459
Source: NHTSA files and the OBD-II standardCan I keep driving with P2459 stored?
Nobody can answer that from the code alone, and a site that does is guessing. A steady light generally means the fault was logged and the vehicle is in a reduced-risk mode; a flashing light means stop soon, because a misfiring engine can destroy a catalytic converter in minutes. The safe read of this page is the mileage and the components, not permission.
Does a code mean the car is recalled?
No. Recalls are filed by campaign and matched by VIN, and none of them are triggered by a scan tool. If you want to know whether an open recall applies to one specific vehicle, check the VIN at nhtsa.gov/recalls — that is the only source that settles it.
Why do the counts here differ from other sites?
Because these are not estimates. Every number on this page is a count of documents in NHTSA's own files: manufacturer communications that name the code in their filed summary, and owner complaints that name it in the narrative. We do not model, weight or extrapolate them.
Will clearing the code fix it?
Clearing turns the light off and erases the freeze-frame data a technician would have used to work out what happened. If the condition is still there the code returns, usually within a few drive cycles, and the diagnosis now starts from less information than before.