# P0299 on the 2021 Ram 2500

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.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0299

- [11029754](https://open.wenmarpro.com/bulletins/11029754), 2026-03-05: Cummins 6.7L Air Filter Replacement DTC P0299 Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code \(DTC\): ● P0299\-00 \- Turbocharger Underboost. Customers may also comment on the following: ● Low power/acceleration or lag condition. This bulletin involves performing an Air Handling Performance Test \(APT\) and possibly replacing the air filter.
- [11025040](https://open.wenmarpro.com/bulletins/11025040), 2025-11-05: 1. General Parts Update The recommended air filter for 2019 Model Year \(MY\) and newer 6.7L Cummins equipped vehicles has been updated. New Part: 68645327AA \(Non\-Oiled Air Filter\) Replaces: 53034051AA \(Oiled Air Filter\) \- This part is superseded and should no longer be installed. The air filter for all other applications remains unchanged: Continue to use 68517554AA for: All 2018 MY and older 6.7L Cummins equipped vehicles. All 2019 MY and newer vehicles with non\-6.7L engines. 2. Special Service Procedure for DTC P0299 Application: 2019\-2024 MY HD Trucks with 6.7L Diesel \(ETM/ETN\) Condition: If DTC P0299 is active and the vehicle is equipped with the previous oiled air filter \(PN\# 53034051AA\). Procedure: Replace the oiled air filter \(53034051AA\) with the new non\-oiled filter \(68645327AA\). Service Catalog reflects these updated usages.
- [10239971](https://open.wenmarpro.com/bulletins/10239971), 2023-07-31: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes \(DTC\)s have been set: ? \*\*P0299 \- Turbocharger Underboost.\*\* ? P061B \- Internal Control Module Torque Calculation Performance. ? P0755 \- Shift Solenoid B \(DG7 Only\). ? P0765 \- Shift Solenoid D \(DG7 Only\). ? P0401 \- EGR System Performance. ? P0755 \- 2C Solenoid Circuit. ? P0765 \- UD Solenoid Circuit. ? P244A \- Diesel Particulate Filter Differential Pressure Too Low. ? P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. ? P242F \- Diesel Particulate Filter Restriction \- Ash Accumulation. ? P1451 \- Diesel Particulate Filter System Performance. ? P2463 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. ? P0607\-00 \- ECU Internal Performance. ? P0299\-00 \- Turbocharger Underboost. ? P1451\-00 \- Diesel Particulate Filter System Performance \(Sales Code ETL Only\).
- [10218562](https://open.wenmarpro.com/bulletins/10218562), 2022-08-22: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module \(ECM/PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: P0607\-00 \- ECU Internal Performance. P0299\-00 \- Turbocharger Underboost. P1451\-00 \- Diesel Particulate Filter System Performance\(ETL Sales Code only\). The following improvements are also included in this update: Oil pressure switch modifications. Urea \(DEF fliud\) level sensor calibration update, to help prevent bumps in DEF level gauge.
- [10214598](https://open.wenmarpro.com/bulletins/10214598), 2022-06-27: Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule \(ECM/PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or moreof the following DTCs have been set: P0299 \- Turbocharger Underboost. P0401 \- EGR System Performance. P0755 \- 2C Solenoid Circuit. P0765 \- UD Solenoid Circuit. P244A \- Diesel Particulate Filter Differential Pressure Too Low. P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. P242F \- Diesel Particulate Filter Restriction \- Ash Accumulation. P1451 \- Diesel Particulate Filter System Performance. P2463 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. P0607\-00 \- ECU Internal Performance. P0299\-00 \- Turbocharger Underboost. P1451\-00 \- Diesel Particulate Filter System Performance\(Sales Code ETL Only\). In addition, the customer may notice one or more the following conditions: Idle instability. Air handling bump after startup. Harsh shifts during garage shift tip\-in. 2\-1\-2 gear hunting at low speeds, especially on grades. Driveline ?clunk? ?bump? during D\-R and R\-D GarageShifts. Harsh 5\-3 downshift. 2\-1 ERS downshift with exhaust brake on, performance improvement. Intermittent shift bump. The following improvements are also included in this update: Fuel System Run\-Up Test routine, wiTECH improvement. wiTECH PCM data improvements. wiTECH cylinder cut\-out routine, wiTECH improvement. Oil pressure switch modifications. Urea \(DEF fluid\) level sensor calibration update, to help prevent bumpsin DEF level gauge.