# P1451 on the 2025 Ram 5500

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P1451

- [11030012](https://open.wenmarpro.com/bulletins/11030012), 2026-03-13: Flash: Powertrain Control Module \(PCM\) Updates V2D Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P0506\-00 \- Idle Control System RPM \- Lower Than Expected. ● P20CF\-00 \- Exhaust Aftertreatment Fuel Injector "A" Stuck Open. ● P20DB\-00 \- Exhaust Aftertreatment Fuel Supply Control Stuck Open. ● P040B\-00 \- EGR Temperature Sensor 1 Circuit Performance. ● U0109\-00 \- Lost Communication With Fuel Pump Control Module. ● P1451\-00 \- Diesel Particulate Filter System Performance. ● P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. ● P1191\-00\-Inlet Air Temperature Sensor Rational/Performance. ● P229F\-00 \- NOX Sensor Circuit Range/Performance \- Bank 1. ● P2281\-00 \- Air Leak Between MAF And Throttle Body.\*\* ● P06B9\-00 \- Cylinder 1 Glow Plug Circuit Performance. ● P06BA\-00 \- Cylinder 2 Glow Plug Circuit Performance. ● P06BB\-00 \- Cylinder 3 Glow Plug Circuit Performance. ● P06BC\-00 \- Cylinder 4 Glow Plug Circuit Performance. ● P06BD\-00 \- Cylinder 5 Glow Plug Circuit Performance. ● P06BE\-00 \- Cylinder 6 Glow Plug Circuit Performance. ● P0263\-00 \- Cylinder 1 Contribution/balance. ● P0266\-00 \- Cylinder 2 Contribution\-balance. ● P0269\-00 \- Cylinder 3 Contribution/balance. ● P0272\-00 \- Cylinder 4 Contribution/balance. ● P0275\-00 \- Cylinder 5 Contribution/balance. ● P0278\-00 \- Cylinder 6 Contribution/balance. ● P026B\-00 \- Injection Timing Performance. ● P020A\-00 \- Cylinder 1 Injection Timing. ● P020B\-00 \- Cylinder 2 Injection Timing. ● P020C\-00 \- Cylinder 3 Injection Timing. ● P020D\-00 \- Cylinder 4 Injection Timing. ● P020E\-00 \- Cylinder 5 Injection Timing. ● P020F\-00 \- Cylinder 6 Injection Timing. T18 FSAR\-TSB\-6966 \-2\- ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. ● P0087\-00 \- Fuel Rail Pressure Too Low. ● P2543\-00 \- Low Pressure Fuel System Sen
- [11028237](https://open.wenmarpro.com/bulletins/11028237), 2026-02-04: Flash: Powertrain Control Module \(PCM\) Updates V2C Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P06B9\-00 \- Cylinder 1 Glow Plug Circuit Performance. ● P06BA\-00 \- Cylinder 2 Glow Plug Circuit Performance. ● P06BB\-00 \- Cylinder 3 Glow Plug Circuit Performance. ● P06BC\-00 \- Cylinder 4 Glow Plug Circuit Performance. ● P06BD\-00 \- Cylinder 5 Glow Plug Circuit Performance. ● P06BE\-00 \- Cylinder 6 Glow Plug Circuit Performance. ● P0263\-00 \- Cylinder 1 Contribution/balance. ● P0266\-00 \- Cylinder 2 Contribution\-balance. ● P0269\-00 \- Cylinder 3 Contribution/balance. ● P0272\-00 \- Cylinder 4 Contribution/balance. ● P0275\-00 \- Cylinder 5 Contribution/balance. ● P0278\-00 \- Cylinder 6 Contribution/balance. ● P026B\-00 \- Injection Timing Performance. ● P020A\-00 \- Cylinder 1 Injection Timing. ● P020B\-00 \- Cylinder 2 Injection Timing. ● P020C\-00 \- Cylinder 3 Injection Timing. ● P020D\-00 \- Cylinder 4 Injection Timing. ● P020E\-00 \- Cylinder 5 Injection Timing. ● P020F\-00 \- Cylinder 6 Injection Timing. ● P0072\-00 \- Ambient Air Temperature Sensor Circuit "A" Low. ● P0087\-00 \- Fuel Rail Pressure Too Low. ● P2540\-00 \- Low Pressure Fuel System Sensor Circuit Range/Performance. ● P2543\-00 \- Low Pressure Fuel System Sensor Circuit Intermittent. ● P20EE\-00 \- SCR NOX Catalyst Efficiency Below Threshold \- Bank 1 Catalyst 1. ● P203F\-00 \- Reductant Level Too Low. ● P2698\-00 \- Exhaust Aftertreatment Fuel Injector "A" Performance. ● P1C54\-00 \- SCR NOX Catalyst Missing. ● P056E\-00 \- Cold Start Turbocharger/Supercharger Boost Control "A" Performance. ● P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation. ● P1451\-00 \- Diesel Particulate Filter System Performance. M18 FSAR\-TSB\-6454 \-2\- ● P0234\-00 \- Turbocharger Overboost Condition. ● P20E8\-00 \- Reductant Pressure Too Low. ● P208B\-00 \- Reductant Pump 1 Control Performance. Customers may also comment on one or more of
- [11024054](https://open.wenmarpro.com/bulletins/11024054), 2025-10-08: 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 \(DTCs\):\*\* ● \*\*P0263 \- 00 Cylinder 1 Contribution/balance. ● P0266 \- 00 Cylinder 2 Contribution\-balance. ● P0269 \- 00 Cylinder 3 Contribution/balance. ● P0272 \- 00 Cylinder 4 Contribution/balance. ● P0275 \- 00 Cylinder 5 Contribution/balance. ● P0278 \- 00 Cylinder 6 Contribution/balance. ● P026B \- 00 Injection Timing Performance. ● P020A \- 00 Cylinder 1 Injection Timing. ● P020B \- 00 Cylinder 2 Injection Timing. ● P020C \- 00 Cylinder 3 Injection Timing. ● P020D \- 00 Cylinder 4 Injection Timing. ● P020E \- 00 Cylinder 5 Injection Timing. ● P020F \- 00 Cylinder 6 Injection Timing. ● P06B9 \- 00 Cylinder 1 Glow Plug Circuit Performance. ● P06BA \- 00 Cylinder 2 Glow Plug Circuit Performance. ● P06BB \- 00 Cylinder 3 Glow Plug Circuit Performance. ● P06BC \- 00 Cylinder 4 Glow Plug Circuit Performance. ● P06BD \- 00 Cylinder 5 Glow Plug Circuit Performance. ● P06BE \- 00 Cylinder 6 Glow Plug Circuit Performance. ● P0072 \- 00 Ambient Air Temperature Sensor Circuit "A" Low. ● P0087 \- 00 Fuel Rail Pressure Too Low. ● P2540 \- 00 Low Pressure Fuel System Sensor Circuit Range/Performance. ● P2543 \- 00 Low Pressure Fuel System Sensor Circuit Intermittent. ● P20EE \- 00 SCR NOX Catalyst Efficiency Below Threshold \- Bank 1 Catalyst 1. ● P203F \- 00 Reductant Level Too Low. ● P2698 \- 00 Exhaust Aftertreatment Fuel Injector "A" Performance.\*\* ● P1C54 \- 00 SCR NOX Catalyst Missing. ● P056E \- 00 Cold Start Turbocharger/Supercharger Boost Control "A" Performance. ● P242F \- 00 Diesel Particulate Filter Restriction \- Ash Accumulation. ● P1451 \- 00 Diesel Particulate Filter System Performance. ● P0234 \- 00 Turbocharger Overboost Condition. ● P20E8 \- 00 Reductant Pressure Too Low. ● P208B \- 00 Reductant Pump 1 Control Performance. Customers may also comment on one or more of the following: ● \*\*Diesel Exhaust Fluid \(DEF\) level gauge inaccuracy. ● Poor cold start performance. ● Unable to initiate manual Diesel Particulate Filter \(DPF\) regen through EVIC.\*\* ● Unable to engage Power Take\-Off \(PTO\) in mobile condition while the vehicle is moving, but has no issue engaging PTO while the vehicle is stationary. ● Engine stalls under high PTO loads at high altitudes. ● PTO does not work during the split\-shaft mode. ● Engine/Cab shake during engine shutdown. ● PTO light not blinking when PTO disengaged. ● Poor engine starting performance. ● DEF level gauge fluctuations. ● In cold conditions the engine automatically increases idle speed when in Park to help with warm\-up. Once warmed up, it returns to normal idle speed. If the engine is cycling in and out of this elevated idle speed condition, the customer could complain that its not behaving properly. ● Poor alternator charging and battery life \*\*This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.\*\*
- [11021560](https://open.wenmarpro.com/bulletins/11021560), 2025-08-06: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● P1C54\-00 \- SCR NOX Catalyst Missing. ● P056E\-00 \- Cold Start Turbocharger/Supercharger Boost Control "A" Performance. ● P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation. ● P1451\-00 \- Diesel Particulate Filter System Performance. ● P0234\-00 \- Turbocharger Overboost Condition. ● P20E8\-00 \- Reductant Pressure Too Low. ● P208B\-00 \- Reductant Pump 1 Control Performance. Customers may also comment on one or more of the following: ● Unable to engage Power Take\-Off \(PTO\) in mobile condition while the vehicle is moving, but has no issue engaging PTO while the vehicle is stationary. ● Engine stalls under high PTO loads at high altitudes. ● PTO does not work during the split\-shaft mode. ● Engine/Cab shake during engine shutdown. ● PTO light not blinking when PTO disengaged. ● Poor engine starting performance. ● Diesel Exhaust Fluid \(DEF\) level gauge fluctuations. ● In cold conditions the engine automatically increases idle speed when in Park to help with warm\-up. Once warmed up, it returns to normal idle speed. If the engine is cycling in and out of this elevated idle speed condition, the customer could complain that its not behaving properly. ● Poor alternator charging and battery life This bulletin involves reprogramming the PCM with the latest available software.