{"vehicle":{"id":"2014_ram_4500","year":2014,"make":"Ram","model":"4500"},"code":"P20EE","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":12,"bulletins":[{"nhtsa_id":10224626,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-10-24","date":"2016-04-01","document_id":"18-038-16","mfr_campaign":null,"component":"ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL; FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING","summary":"P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 This bulletin involves verifying the proper operation of the Diesel Exhaust Fluid (DEF) system and, if necessary, replacing the Selective Catalyst Reduction (SCR) Catalyst assembly. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find Diagnostic Trouble Code (DTC) P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 set in the Powertrain Control Module (PCM) memory.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10224626-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10224626-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10224626"},{"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":10216204,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-07-25","date":"2015-10-31","document_id":"18-079-15","mfr_campaign":null,"component":"EXTERIOR LIGHTING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE","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. Other Updates: ? SCR Efficiency scan tool test improvement.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10216204-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10216204-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10216204"},{"nhtsa_id":10176590,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-06-22","date":"2020-05-27","document_id":"18-042-20","mfr_campaign":null,"component":"FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; EQUIPMENT; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","summary":"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 DTCs have been set:There will be a choice between two 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.Improvements to prevent or reduce MIL illumination when no defect is present for:P2201 - Aftertreatment Nox Sensor Circuit Performance - Bank 1 Sensor 1(Ammonia delete systems only). P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1(New Improvements for ammonia delete systems only). P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance(New Improvements for ammonia delete systems only). P218F - Reductant No Flow Detected. P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1. U0001 - CAN C Bus. P229E - NOx Sensor Circuit - Bank 1 Sensor 2(Non-ammonia delete systems only). U059F - Invalid Data Received From NOx Sensor \"B\"(Non-ammonia delete systems only). P22A7 - NOx Sensor Heater Circuit Performance - Bank 1 Sensor 2(Non-ammonia delete systems only). P2459 - Diesel Particulate Filter Regeneration Too Frequent. P242F - Diesel Particulate Filter Restriction - Ash Accumulation. 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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10176590-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10176590-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10176590"},{"nhtsa_id":10159952,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2019-05-20","date":"2015-11-21","document_id":"18-091-15","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","summary":"P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 This bulletin involves verifying the proper operation of the Diesel Exhaust Fluid (DEF) system and, if necessary, replacing the Selective Catalyst Reduction (SCR) Catalyst assembly. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find Diagnostic Trouble Code (DTC) P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 set in the Powertrain Control Module (PCM) memory.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159952-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10159952-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10159952"},{"nhtsa_id":10151785,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-12-17","date":"2015-10-31","document_id":"18-079-15","mfr_campaign":null,"component":"EXTERIOR LIGHTING; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC","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. Other Updates: ? SCR Efficiency scan tool test improvement.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10151785-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2015/MC-10151785-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10151785"},{"nhtsa_id":10140170,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-06-11","date":"2016-04-01","document_id":"18-038-16","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 This bulletin involves verifying the proper operation of the Diesel Exhaust Fluid (DEF) system and, if necessary, replacing the Selective Catalyst Reduction (SCR) Catalyst assembly. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find Diagnostic Trouble Code (DTC) P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 set in the Powertrain Control Module (PCM) memory.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10140170-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10140170-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10140170"}],"url":"https://open.wenmarpro.com/makes/ram/4500/2014/bulletins?code=P20EE"},"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/4500/2014/codes/P20EE","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."]}