{"vehicle":{"id":"2014_ram_5500","year":2014,"make":"Ram","model":"5500"},"code":"P0604","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":8,"bulletins":[{"nhtsa_id":10221077,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2014-12-18","document_id":"1800214REVC","mfr_campaign":null,"component":"SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION; POWER TRAIN; EXTERIOR LIGHTING; STRUCTURE; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL","summary":"Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel.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.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. P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. P2281 - Air Leak Between MAF And Throttle Body. P0128 - Thermostat Rationality. In low ambient temperatures. U1421 - Implausible Ignition Key Off Time Received. 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 Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC.Other Updates: Urea system calibration changes. Fuel Filter Minder Calibration Changes. Cruise control system improvements. Improvements in exhaust brake switch operation. Charging system improvements for dual alternator applications. Various wiTECH data and system test additions and improvements. OBD Template changes for P2453. Dual Fuel Tank component update. Inducement Timer Reset (Feature enable in wiTech). PTO Denied Status Message Update. PTO Horn Request sent to Body Control Unit (BCU.)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10221077-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10221077-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10221077"},{"nhtsa_id":10220999,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-09-26","date":"2014-09-04","document_id":"1800214","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","summary":"Flash: Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. Software To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 - P0206 - FUEL INJECTOR X CIRCUIT/OPEN Fault Codes. ? U110E - LOST AMBIENT TEMPERATURE MESSAGE. ? P049D - EGR CONTROL POSITION EXCEEDED LEARNING LIMIT. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: ? P0087 - FUEL RAIL PRESSURE TOO LOW. ? P0544 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT - SENSOR 1/1. ? P2281 - AIR LEAK BETWEEN MAF AND THROTTLE BODY. ? P0128 - THERMOSTAT RATIONALITY. In low ambient temperatures. ? U3017 - CONTROL MODULE TIMER/CLOCK PERFORMANCE. ? U1421 - IMPLAUSIBLE IGNITION KEY OFF TIME RECEIVED. ? P202E - (DIESEL EXHAUST FLUID) REDUCTANT INJECTOR PERFORMANCE. ? P20EE - SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD - BANK 1. ? P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD. ? P0604 - INTERNAL CONTROL MODULE RAM ERROR. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC. Other Updates: ? Fuel Filter Minder Calibration Changes ? Cruise control system improvements. ? Improvements in exhaust brake switch operation. ? Charging system improvements for dual alternator applications. ? Various wiTECH data and system test additions and improvements. ? OBD Template changes for P2453. ? Dual Fuel Tank component update. ? Inducement Timer Reset (Feature enable in wiTech). ? PTO Denied Status Message Update. ? PTO Horn Request sen","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10220999-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10220999-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10220999"},{"nhtsa_id":10218202,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-22","date":"2014-11-14","document_id":"18-002-14","mfr_campaign":null,"component":"FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; POWER TRAIN","summary":"Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel.Software To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Tripped As A One Trip Fault And Should Have Been 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.Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: P0087 - Fuel Rail Pressure Too Low. P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. P2281 - Air Leak Between MAF And Throttle Body. P0128 - Thermostat Rationality. In low ambient temperatures. U3017 - Control Module Timer/Clock Performance. U1421 - Implausible Ignition Key Off Time Received. 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 Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC.Other Updates: Urea system calibration changes. Fuel Filter Minder Calibration Changes. Cruise control system improvements. Improvements in exhaust brake switch operation. Charging system improvements for dual alternator applications. Various wiTECH data and system test additions and improvements. OBD Template changes for P2453. Dual Fuel Tank component update. Inducement Timer Reset (Feature enable in wiTech). PTO Denied Status Message Update. PTO Horn Request sent to Body Control Unit (BCU.)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218202-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10218202-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10218202"},{"nhtsa_id":10217442,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-08-08","date":"2015-10-31","document_id":"18-079-15","mfr_campaign":null,"component":"FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING","summary":"Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. WARNING:There will be a choice between 2 calibrations. One for vehicles that utilize an ammonia sensor and one for vehicles that have had the ammonia sensor removed. Be sure to select the correct software based on vehicle configuration. 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. P049D - EGR Control Position Exceeding Learning Limit. Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For: ? P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit Intermittent (setting when the block heater is plugged in). ? P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low. ? U110E - Lost Ambient Temperature Message. ? U3017 - Control Module Timer/Clock Performance. ? P0087 - Fuel Rail Pressure Too Low. ? P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. ? P2281 - Air Leak Between MAF And Throttle Body. ? P0128 - Thermostat Rationality. In low ambient temperatures. ? U1421 - Implausible Ignition Key Off Time Received. ? 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 Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC. ? SCR Efficiency scan tool test improvement.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10217442-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10217442-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10217442"},{"nhtsa_id":10139907,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-12-18","document_id":"18-002-14 REV. C","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel.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.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. P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. P2281 - Air Leak Between MAF And Throttle Body. P0128 - Thermostat Rationality. In low ambient temperatures. U1421 - Implausible Ignition Key Off Time Received. 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 Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC.Other Updates: Urea system calibration changes. Fuel Filter Minder Calibration Changes. Cruise control system improvements. Improvements in exhaust brake switch operation. Charging system improvements for dual alternator applications. Various wiTECH data and system test additions and improvements. OBD Template changes for P2453. Dual Fuel Tank component update. Inducement Timer Reset (Feature enable in wiTech). PTO Denied Status Message Update. PTO Horn Request sent to Body Control Unit (BCU.)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139907-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139907-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139907"},{"nhtsa_id":10139835,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-11-14","document_id":"18-002-14 REV. B","mfr_campaign":null,"component":"POWER TRAIN; ENGINE AND ENGINE COOLING","summary":"Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel.Software To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Tripped As A One Trip Fault And Should Have Been 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.Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: P0087 - Fuel Rail Pressure Too Low P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1 P2281 - Air Leak Between MAF And Throttle Body P0128 - Thermostat Rationality. In low ambient temperatures U3017 - Control Module Timer/Clock Performance U1421 - Implausible Ignition Key Off Time Received 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 Error. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a service electronic throttle control message in the EVIC.Other Updates: Urea system calibration changes Fuel Filter Minder Calibration Changes Cruise control system improvements Improvements in exhaust brake switch operation Charging system improvements for dual alternator applications Various wiTECH data and system test additions and improvements OBD Template changes for P2453 Dual Fuel Tank component update Inducement Timer Reset (Feature enable in wiTech) PTO Denied Status Message Update PTO Horn Request sent to Body Control Unit (BCU.)","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139835-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139835-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139835"},{"nhtsa_id":10139600,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2014-09-04","document_id":"18-002-14 REV. A","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE","summary":"Flash: Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. Software To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 - P0206 - FUEL INJECTOR X CIRCUIT/OPEN Fault Codes. ? U110E - LOST AMBIENT TEMPERATURE MESSAGE. ? P049D - EGR CONTROL POSITION EXCEEDED LEARNING LIMIT. Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: ? P0087 - FUEL RAIL PRESSURE TOO LOW. ? P0544 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT - SENSOR 1/1. ? P2281 - AIR LEAK BETWEEN MAF AND THROTTLE BODY. ? P0128 - THERMOSTAT RATIONALITY. In low ambient temperatures. ? U3017 - CONTROL MODULE TIMER/CLOCK PERFORMANCE. ? U1421 - IMPLAUSIBLE IGNITION KEY OFF TIME RECEIVED. ? P202E - (DIESEL EXHAUST FLUID) REDUCTANT INJECTOR PERFORMANCE. ? P20EE - SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD - BANK 1. ? P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD. ? P0604 - INTERNAL CONTROL MODULE RAM ERROR. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC. Other Updates: ? Fuel Filter Minder Calibration Changes ? Cruise control system improvements. ? Improvements in exhaust brake switch operation. ? Charging system improvements for dual alternator applications. ? Various wiTECH data and system test additions and improvements. ? OBD Template changes for P2453. ? Dual Fuel Tank component update. ? Inducement Timer Reset (Feature enable in wiTech). ? PTO Denied Status Message Update. ? PTO Horn Request sen","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139600-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10139600-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10139600"},{"nhtsa_id":10136917,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-05-21","date":"2014-01-17","document_id":"18-002-14","mfr_campaign":null,"component":"FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM","summary":"Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo Diesel. Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTC?s). These DTC?s Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P049D - EGR CONTROL POSITION EXCEEDED LEARNING LIMIT Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: ? P202E - (DIESEL EXHAUST FLUID) REDUCTANT INJECTOR PERFORMANCE ? P20EE - SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD - BANK 1 ? P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD ? P0604 - INTERNAL CONTROL MODULE RAM ERROR. This DTC may be caused by enabling the remote throttle feature via the EVIC, and it will be accompanied by a ?service electronic throttle control? message in the EVIC. Other Updates: ? OBD Template changes for P2453 ? Fuel Filter Minder Calibration Changes ? Dual Fuel Tank component update ? Inducement Timer Reset (Feature enable in wiTech) ? PTO Denied Status Message Update ? PTO Horn Request sent to Body Control Unit (BCU) ? Wait To Start (WTS) bulb check timing improvements (1 second) ? Frozen CAC Diagnostic Improvement","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10136917-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2014/MC-10136917-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10136917"}],"url":"https://open.wenmarpro.com/makes/ram/5500/2014/bulletins?code=P0604"},"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/5500/2014/codes/P0604","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."]}