P2509
0 owner reports and 7 manufacturer filings across 3 model years from Nissan, Ram.
Where P2509 shows up
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 Ram 2500 | Power Train | 3 | — |
| 2016 Nissan Titan XD | Electrical System | 2 | — |
| 2025 Ram 3500 | Electrical System | 2 | — |
A 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
Manufacturer filings that name it
Source: NHTSA manufacturer communicationsService bulletins and campaigns whose filed summary names P2509. Quoting the document number at a service desk is often the fastest route to a diagnosis someone has already written down.
- 18-020-25 REV. B2025-09-30 · Unknown Or Other
- Flash: Powertrain Control Module (PCM) Updates *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—� **P0263 - 00 Cylinder 1 Contribution/balance. â—� P0266 - 00 Cylinder 2 Contribution-balance. â—� P0269 - 00 Cylinder 3 Contribution/balance. â—� P0272 - 00 Cylinder 4 Contribut
- 18-021-25 REV. A2025-05-15 · Power Train
- "Flash: Powertrain Control Module (PCM) Updates Customers may comment on one or more of the following: â—� Malfunction Indicator Lamp (MIL) or check engine light illuminated. â—� Cruise control drops out/cancels on its own. â—� Engine stumble, runs rough, or a slight lack of power. The following software enhancements are also available: â—� Reduce the occurrence of false faults Diagnostic Trouble
- 18-020-25 REV. A2025-05-15 · Power Train
- "Flash: Powertrain Control Module (PCM) Updates Customers may comment on one or more of the following: â—� Malfunction Indicator Lamp (MIL) or check engine light illuminated. â—� Cruise control drops out/cancels on its own. â—� Engine stumble, runs rough, or a slight lack of power. The following software enhancements are also available: â—� Reduce the occurrence of false faults Diagnostic Trouble
- 18-021-252025-04-17 · Electrical System
- "Flash: Powertrain Control Module (PCM) Updates Customers may comment on one or more of the following: â—� Malfunction Indicator Lamp (MIL) or check engine light illuminated. â—� Cruise control drops out/cancels on its own. â—� Engine stumble, runs rough, or a slight lack of power. The following software enhancements are also available: â—� Reduce the occurrence of false faults DTCs P0300 and P031
- 18-020-252025-04-17 · Power Train
- "Flash: Powertrain Control Module (PCM) Updates Customers may comment on one or more of the following: â—� Malfunction Indicator Lamp (MIL) or check engine light illuminated. â—� Cruise control drops out/cancels on its own. â—� Engine stumble, runs rough, or a slight lack of power. The following software enhancements are also available: â—� Reduce the occurrence of false faults DTCs P0300 and P031
- NTB15-1162015-12-22 · Electrical System — 12V/24V/48V Battery
- 2016 Titan XD Diesel; Battery disconnect wait time/DTCS P2509 & P181B Cummins 5.0 L Turbo Diesel.
What P2509 means
Source: SAE J2012 / OBD-IIP2509 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 P2509
Source: NHTSA files and the OBD-II standardCan I keep driving with P2509 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.