# P04DB on the 2014 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 P04DB

- [10228112](https://open.wenmarpro.com/bulletins/10228112), 2022-12-19: Flash: 6.7L Diagnostic And System Improvements 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, a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) set in the PCM memory: · \*\*P218F \- Reductant No Flow Detected. · P242F \- Diesel Particulate Filter Restriction \- Ash Accumulation. · P2281 \- Air Leak Between MAF And Throttle Body.\*\* · P205E \- \(Diesel Exhaust Fluid\) Reductant Tank Temperature Sensor Circuit Intermittent \(setting when the block heater is plugged in\). · U110E \- Lost Ambient Temperature Message. · P20E8 \- \(Diesel Exhaust Fluid\) Reductant Pressure Too Low. · P1477 \- Intake Air Diverter Valve Position Sensor Circuit Shorted To Ground. · U3017 \- Control Module Timer/Clock Performance. · P0087 \- Fuel Rail Pressure Too Low. · P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. · P0128 \- Thermostat Rationality. In cold ambient temperatures. · P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. · P24A5 \- Exhaust Gas Recirculation \(EGR\) Cooler Bypass Bank 1 Control Stuck. · P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. · U1421 \- Implausible Ignition Key Off Time Received. · P0420 \- Catalyst Efficiency Below Threshold. · P026B \- Injection Timing Performance. · P04DB \- Crankcase Ventilation System Disconnected. · P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. · P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. · P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. · P2002 \- Diesel Particulate Filter Efficiency Below Threshold. · P0604 \- Internal Control Module RAM. · P1451 \- Diesel Particulate Filter System Performance.
- [10221081](https://open.wenmarpro.com/bulletins/10221081), 2022-09-26: Flash: 6.7L Diagnostic And System Improvements Bulletin involves reprogramming the Powertrain Control Module \(PCM\) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows:Prevent Or Reduce Malfunction Indicator Lamp \(MIL\) Illumination When No Defect is Present Following Diagnostic Trouble Codes \(DTCs\). These Faults Have Been Changed From P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. U110E \- Lost Ambient Temperature Message. P049D \- EGR Control Position Exceeding Learning Limit. P226C \- Turgocharger Boost Control ?A? Slow Response.The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: U1A24 \- Lost Communication With Ammonia Sensor.Improvements To Prevent/ Reduce Malfunction Indicator Lamp \(MIL\) Illumination When No Defect Is Present For: U3017 \- Control Module Timer/Clock Performance. P0087 \- Fuel Rail Pressure Too Low. P2281 \- Air Leak Between MAF And Throttle Body. P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. P0128 \- Thermostat Rationality. In cold ambient temperatures. P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. U1421 \- Implausible Ignition Key Off Time Received. P0420 \- Catalyst Efficiency Below Threshold. P026B \- Injection Timing Performance. P04DB \- Crankcase Ventilation System Disconnected. P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. P2002 \- Diesel Particulate Filter Efficiency Below Threshold. P0604 \- Internal Control Module RAM. P1451 \- Diesel Particulate Filter System Performance.Other Updates Included: Urea system calibration changes. Fuel Filter Minder Calibrat
- [10218206](https://open.wenmarpro.com/bulletins/10218206), 2022-08-22: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows: Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For The Following DTCs. These Faults Have Been Changed From One Trip Faults To Two Trip Faults: ? P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. ? U110E \- Lost Ambient Temperature Message. ? P049D \- EGR Control Position Exceeding Learning Limit. ? P226C \- Turgocharger Boost Control ?A? Slow Response. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: ? U1A24 \- Lost Communication With Ammonia Sensor. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P0087 \- Fuel Rail Pressure Too Low. ? P2281 \- Air Leak Between MAF And Throttle Body. ? P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. ? P0128 \- Thermostat Rationality. In cold ambient temperatures. ? P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ? P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. ? P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. ? U3017 \- Control Module Timer/Clock Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P0420 \- Catalyst Efficiency Below Threshold. ? P026B \- Injection Timing Performance. ? P04DB \- Crankcase Ventilation System Disconnected. ? P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. ? P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. ? P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. ? P2002 \- Diesel Particulate Filter Efficiency Below Threshold. ? P0604 \- Internal Control Module RAM. ? P1451 \- Diesel Particulate Filter System Performance. Other Updates Included: ? Urea system cali
- [10159918](https://open.wenmarpro.com/bulletins/10159918), 2019-05-20: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module \(ECM/PCM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) Illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) set in the PCM memory: ? P205E \- \(Diesel Exhaust Fluid\) Reductant Tank Temperature Sensor Circuit Intermittent \(setting when the block heater is plugged in\). ? U110E \- Lost Ambient Temperature Message. ? P20E8 \- \(Diesel Exhaust Fluid\) Reductant Pressure Too Low. ? P2281 \- Air Leak Between MAF And Throttle Body. ? P1477 \- Intake Air Diverter Valve Position Sensor Circuit Shorted To Ground. ? U3017 \- Control Module Timer/Clock Performance. ? P0087 \- Fuel Rail Pressure Too Low. ? P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. ? P0128 \- Thermostat Rationality. In cold ambient temperatures. ? P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ? P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. ? P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P0420 \- Catalyst Efficiency Below Threshold. ? P026B \- Injection Timing Performance. ? P04DB \- Crankcase Ventilation System Disconnected. ? P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. ? P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. ? P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. ? P2002 \- Diesel Particulate Filter Efficiency Below Threshold. ? P0604 \- Internal Control Module RAM. ? P1451 \- Diesel Particulate Filter System Performance. In addition to the above symptoms, the following software improvements are also included in this update: The Following DTCs Have Been Changed From A One Trip Fault To A Two Trip Fault: ? P0201 \- P0206 \- Fuel injector
- [10148920](https://open.wenmarpro.com/bulletins/10148920), 2018-11-26: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module \(ECM/PCM\) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp \(MIL\) Illumination. Upon further investigation, a technician may find one or more of the following Diagnostic Trouble Codes \(DTCs\) set in the PCM memory. ? P2281 \- Air Leak Between MAF And Throttle Body. ? P1477 \- Intake Air Diverter Valve Position Sensor Circuit Shorted To Ground. ? U3017 \- Control Module Timer/Clock Performance. ? U110E \- Lost Ambient Temperature Message. ? P0087 \- Fuel Rail Pressure Too Low. ? P2281 \- Air Leak Between MAF And Throttle Body. ? P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. ? P0128 \- Thermostat Rationality. In cold ambient temperatures. ? P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ? P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. ? P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P0420 \- Catalyst Efficiency Below Threshold. ? P026B \- Injection Timing Performance. ? P04DB \- Crankcase Ventilation System Disconnected. ? P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. ? P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. ? P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. ? P2002 \- Diesel Particulate Filter Efficiency Below Threshold. ? P0604 \- Internal Control Module RAM. ? P1451 \- Diesel Particulate Filter System Performance. In addition to the above symptoms, the following software improvements are also included in this update. The Following DTCs Have Been Changed From A One Trip Fault To A Two Trip Fault: ? P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. ? P049D \- EGR Control Position Exceeding Learning Limit. ? P226C \- Turbocharger Boost Control
- [10139911](https://open.wenmarpro.com/bulletins/10139911), 2018-06-11: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows:Prevent Or Reduce Malfunction Indicator Lamp \(MIL\) Illumination When No Defect is Present For The Following Diagnostic Trouble Codes \(DTCs\). These Faults Have Been Changed From A One Trip Fault To A Two Trip Fault: P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. U110E \- Lost Ambient Temperature Message. P049D \- EGR Control Position Exceeding Learning Limit. P226C \- Turgocharger Boost Control ?A? Slow Response.The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: U1A24 \- Lost Communication With Ammonia Sensor.Improvements To Prevent Or Reduce Malfunction Indicator Lamp \(MIL\) Illumination When No Defect Is Present For: U3017 \- Control Module Timer/Clock Performance P0087 \- Fuel Rail Pressure Too Low P2281 \- Air Leak Between MAF And Throttle Body P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1 P0128 \- Thermostat Rationality. In cold ambient temperatures P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance U1421 \- Implausible Ignition Key Off Time Received P0420 \- Catalyst Efficiency Below Threshold P026B \- Injection Timing Performance P04DB \- Crankcase Ventilation System Disconnected P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1 P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1 P2002 \- Diesel Particulate Filter Efficiency Below Threshold P0604 \- Internal Control Module RAM P1451 \- Diesel Particulate Filter System Performance.Other Updates Included:
- [10139839](https://open.wenmarpro.com/bulletins/10139839), 2018-06-11: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows: Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For The Following DTCs. These Faults Have Been Changed From One Trip Faults To Two Trip Faults: \* P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. \* U110E \- Lost Ambient Temperature Message. \* P049D \- EGR Control Position Exceeding Learning Limit. \* P226C \- Turgocharger Boost Control ?A? Slow Response. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: \* U1A24 \- Lost Communication With Ammonia Sensor. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: \* P0087 \- Fuel Rail Pressure Too Low. \* P2281 \- Air Leak Between MAF And Throttle Body. \* P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. \* P0128 \- Thermostat Rationality. In cold ambient temperatures. \* P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. \* P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. \* P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. \* U3017 \- Control Module Timer/Clock Performance. \* U1421 \- Implausible Ignition Key Off Time Received. \* P0420 \- Catalyst Efficiency Below Threshold. \* P026B \- Injection Timing Performance. \* P04DB \- Crankcase Ventilation System Disconnected. \* P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. \* P202E \- Diesel Exhaust Fluid \(DEF\) Reductant Injector Performance. \* P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. \* P2002 \- Diesel Particulate Filter Efficiency Below Threshold. \* P0604 \- Internal Control Module RAM. \* P1451 \- Diesel Particulate Filter System Performance. Other Updates Included: \* Urea system cali
- [10139778](https://open.wenmarpro.com/bulletins/10139778), 2018-06-11: Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows: Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For The Following DTCs. These Faults Have Been Changed From One Trip Faults To Two Trip Faults: ? P0201 \- P0206 \- Fuel Injector X Circuit Open Fault Codes. ? U110E \- Lost Ambient Temperature Message. ? P049D \- EGR Control Position Exceeding Learning Limit. ? P226C \- Turgocharger Boost Control ?A? Slow Response. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: ? U1A24 \- Lost Communication With Ammonia Sensor. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P0087 \- Fuel Rail Pressure Too Low. ? P2281 \- Air Leak Between MAF And Throttle Body. ? P0544 \- Exhaust Gas Temperature Sensor Circuit \- Sensor 1/1. ? P0128 \- Thermostat Rationality. In cold ambient temperatures. ? P214D \- SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. ? P24A5 \- EGR Cooler Bypass Bank 1 Control Stuck. ? P040B \- Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. ? U3017 \- Control Module Timer/Clock Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P0420 \- Catalyst Efficiency Below Threshold. ? P026B \- Injection Timing Performance. ? P04DB \- Crankcase Ventilation System Disconnected. ? P1C55 \- NOx Sensor Intermittent \- Bank 1 Sensor 1. ? P20EE \- SCR NOx Catalyst Efficiency Below Threshold \- Bank 1. ? P2002 \- Diesel Particulate Filter Efficiency Below Threshold. ? P0604 \- Internal Control Module RAM. ? P1451 \- Diesel Particulate Filter System Performance. Other Updates Included: ? Fuel Filter Minder Calibration Changes ? Cruise control