{"vehicle":{"id":"2014_ram_2500","year":2014,"make":"Ram","model":"2500"},"code":"P0544","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":8,"bulletins":[{"nhtsa_id":10228112,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-12-19","date":"2016-05-07","document_id":"1805416","mfr_campaign":null,"component":"BACK OVER PREVENTION; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC; POWER TRAIN; ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE","summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10228112-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10228112-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10228112"},{"nhtsa_id":10221081,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2014-12-18","document_id":"1805314REVB","mfr_campaign":null,"component":"FUEL SYSTEM, DIESEL; POWER TRAIN; BACK OVER PREVENTION; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC; EXTERIOR LIGHTING","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10221081-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10221081-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221081"},{"nhtsa_id":10218206,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-22","date":"2014-11-14","document_id":"18-053-14","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218206-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218206-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10218206"},{"nhtsa_id":10159918,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-05-20","date":"2015-11-07","document_id":"18-045-15 REV A","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159918-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159918-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10159918"},{"nhtsa_id":10148920,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-26","date":"2015-05-20","document_id":"18-045-15","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148920-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10148920-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10148920"},{"nhtsa_id":10139911,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-12-18","document_id":"18-053-14 REV. B","mfr_campaign":null,"component":"ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN","summary":"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:","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139911-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139911-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139911"},{"nhtsa_id":10139839,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-11-14","document_id":"18-053-14 REV. A","mfr_campaign":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139839-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139839-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139839"},{"nhtsa_id":10139778,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-10-07","document_id":"18-053-14","mfr_campaign":null,"component":"EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","summary":"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","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139778-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139778-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139778"}],"url":"https://open.wenmarpro.com/makes/ram/2500/2014/bulletins?code=P0544"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/ram/2500/2014/codes/P0544","note":"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.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}