Service bulletins for the 2014 Ram 1500
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
615 on file from NHTSA, as of 2026-10-19.
About P20EE on the 2014 Ram 1500: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P20EE are shown. Show all
| 1804514 | 2023-02-21. Service bulletin. ELECTRICAL SYSTEM. P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 |
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| 18-028-14 | 2022-08-29. Service bulletin. FUEL SYSTEM, GASOLINE; POWER TRAIN; ELECTRICAL SYSTEM. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Code(s) may have been set erroneously: ? ? P0045-00 - TURBOCHARGER BOOST CONTROL CIRCUIT/OPEN ? P0087-00 - FUEL RAIL PRESSURE TOO LOW ? P009A-00 - INTAKE AIR TEMPERATURE / AMBIENT AIR TEMPERATURE CORRELATION ? P0128-00 - THERMOSTAT RATIONALITY ? P0234-00 - TURBOCHARGER OVERBOOST CONDITION ? P0420-00 - CATALYST EFFICIENCY (BANK 1) ? P0426-00 - CATALYST TEMPERATURE SENSOR CIRCUIT PERFORMANCE (BANK 1 SENSOR 1) ? P05F8-00 - REDUCTANT HEATER CONTROL MODULE PERFORMANCE ? P050E-00 - COLD START ENGINE EXHAUST TEMPERATURE TOO LOW ? P200A-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 1 ? P200B-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 2 ? P202E-00 - REDUCTANT INJECTION VALVE CIRCUIT PERFORMANCE ? P204F-00 - REDUCTANT SYSTEM PERFORMANCE ? P2080-00 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT PERFORMANCE ? P20BA-00 - REDUCTANT HEATER 1 CONTROL CIRCUIT PERFORMANCE ? P20BE-00 - REDUCTANT PRESSURE LINE HEATER CONTROL CIRCUIT PERFORMANCE ? P20C2-00 - REDUCTANT HEATER 3 CONTROL CIRCUIT PERFORMANCE ? P20E9-00 - REDUCTANT PRESSURE TOO HIGH ? P20EE-00 - SCR NOX CATALYST EFFICIENCY BELOW THRESHOLD BANK 1 ? P225C-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK HIGH ? P225D-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK LOW ? P2453-00 - DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR CIRCUIT PERFORMANCE ? P249C-00 - EXCESSIVE TIME TO ENTER CLOSED LOOP REDUCTANT INJECTION CONTROL ? P24C2-00 - EXHAUST GAS TEMPERATURE MEASUREMENT SYSTEM - MULTIPLE SENSOR CORRELATION BANK 1 ? P24F2-00 - EGR TEMPERATURE/CHARGE AIR COOLER TEMPERATURE CORRELATION ? P2564-00 - TURBOCHARGER POSITION SENSOR C |
| 18-045-14 | 2022-08-22. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, DIESEL. 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. A small number of 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.. |
| 18-028-14 | 2022-08-22. Service bulletin. ELECTRICAL SYSTEM. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Code(s) may have been set erroneously: ? ? P0045-00 - TURBOCHARGER BOOST CONTROL CIRCUIT/OPEN ? P0087-00 - FUEL RAIL PRESSURE TOO LOW ? P009A-00 - INTAKE AIR TEMPERATURE / AMBIENT AIR TEMPERATURE CORRELATION ? P0128-00 - THERMOSTAT RATIONALITY ? P0234-00 - TURBOCHARGER OVERBOOST CONDITION ? P0420-00 - CATALYST EFFICIENCY (BANK 1) ? P0426-00 - CATALYST TEMPERATURE SENSOR CIRCUIT PERFORMANCE (BANK 1 SENSOR 1) ? P05F8-00 - REDUCTANT HEATER CONTROL MODULE PERFORMANCE ? P050E-00 - COLD START ENGINE EXHAUST TEMPERATURE TOO LOW ? P200A-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 1 ? P200B-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 2 ? P202E-00 - REDUCTANT INJECTION VALVE CIRCUIT PERFORMANCE ? P204F-00 - REDUCTANT SYSTEM PERFORMANCE ? P2080-00 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT PERFORMANCE ? P20BA-00 - REDUCTANT HEATER 1 CONTROL CIRCUIT PERFORMANCE ? P20BE-00 - REDUCTANT PRESSURE LINE HEATER CONTROL CIRCUIT PERFORMANCE ? P20C2-00 - REDUCTANT HEATER 3 CONTROL CIRCUIT PERFORMANCE ? P20E9-00 - REDUCTANT PRESSURE TOO HIGH ? P20EE-00 - SCR NOX CATALYST EFFICIENCY BELOW THRESHOLD BANK 1 ? P225C-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK HIGH ? P225D-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK LOW ? P2453-00 - DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR CIRCUIT PERFORMANCE ? P249C-00 - EXCESSIVE TIME TO ENTER CLOSED LOOP REDUCTANT INJECTION CONTROL ? P24C2-00 - EXHAUST GAS TEMPERATURE MEASUREMENT SYSTEM - MULTIPLE SENSOR CORRELATION BANK 1 ? P24F2-00 - EGR TEMPERATURE/CHARGE AIR COOLER TEMPERATURE CORRELATION ? P2564-00 - TURBOCHARGER POSITION SENSOR C |
| 18-064-15 | 2018-11-19. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. P20EE SCR NOX Catalyst Efficiency Below Threshold Bank 1 This bulletin involves 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. |
| 18-045-14 | 2018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 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. A small number of 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.. |
| 18-028-14 REV. C | 2018-06-11. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. It also involves replacement of the Oxygen (O2) Sensor and cleaning or replacement of the Exhaust Gas Temperature (EGT) Sensor 1/2 if necessary depending on codes that have set. A small number of customers may experience an intermittent engine shudder or vibration which may not set a Diagnostic Trouble Code (DTC). In addition other customers may experience a Malfunction Indicator Lamp (MIL) illumination upon which the technician may find one or more of the following DTCs have been set: ? P2459-00 - Diesel Particulate Filter Regeneration Frequency. ? P0133-00 - O2 Sensor 1/1 Slow Response. ? P2084-00 - Exhaust Gas Temperature Sensor Circuit Performance - (1/2). ? P0171-00 - Fuel System 1/1 Lean. ? P0426-00 - Catalyst Temperature Sensor Circuit Performance (1/1). ? P0045-00 - Turbocharger Boost Control Circuit/Open. ? P0087-00 - Fuel Rail Pressure Too Low. ? P009A-00 - Intake Air Temperature/Ambient Air Temperature Correlation. ? P0128-00 - Thermostat Rationality. ? P0234-00 - Turbocharger Overboost Condition. ? P0420-00 - Catalyst Efficiency (Bank 1). ? P05F8-00 - Reductant Heater Control Module Performance. ? P050E-00 - Cold Start Engine Exhaust Temperature Too Low. ? P200A-00 - Intake Manifold Runner Performance - (Bank 1). ? P200B-00 - Intake Manifold Runner Performance - (Bank 2). ? P202E-00 - Reductant Injection Valve Circuit Performance. ? P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. ? P204F-00 - Reductant System Performance. ? P2080-00 - Exhaust Gas Temperature Sensor Circuit Performance. ? P20BA-00 - Reductant Heater 1 Control Circuit Performance. ? P20BE-00 - Reductant Pressure Line Heater Control Circuit Performance. ? P20C2-00 - Reductant Heater 3 Control Circuit Performance. ? P20E9-00 - Reductant Pressure Too High. |
| 18-028-14 REV. B | 2018-06-11. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. It also involves replacement of the Oxygen (O2) Sensor and cleaning or replacement of the Exhaust Gas Temperature (EGT) Sensor 1/2 if necessary depending on codes that have set. A small number of customers may experience an intermittent engine shudder or vibration which may not set a Diagnostic Trouble Code (DTC). In addition other customers may experience a Malfunction Indicator Lamp (MIL) illumination upon which the technician may find one or more of the following DTCs have been set: ? P2459-00 - Diesel Particulate Filter Regeneration Frequency. ? P0133-00 - O2 Sensor 1/1 Slow Response. ? P2084-00 - Exhaust Gas Temperature Sensor Circuit Performance - (1/2). ? P0171-00 - Fuel System 1/1 Lean. ? P0426-00 - Catalyst Temperature Sensor Circuit Performance (1/1). ? P0045-00 - Turbocharger Boost Control Circuit/Open. ? P0087-00 - Fuel Rail Pressure Too Low. ? P009A-00 - Intake Air Temperature/Ambient Air Temperature Correlation. ? P0128-00 - Thermostat Rationality. ? P0234-00 - Turbocharger Overboost Condition. ? P0420-00 - Catalyst Efficiency (Bank 1). ? P05F8-00 - Reductant Heater Control Module Performance. ? P050E-00 - Cold Start Engine Exhaust Temperature Too Low. ? P200A-00 - Intake Manifold Runner Performance - (Bank 1). ? P200B-00 - Intake Manifold Runner Performance - (Bank 2). ? P202E-00 - Reductant Injection Valve Circuit Performance. ? P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. ? P204F-00 - Reductant System Performance. ? P2080-00 - Exhaust Gas Temperature Sensor Circuit Performance. ? P20BA-00 - Reductant Heater 1 Control Circuit Performance. ? P20BE-00 - Reductant Pressure Line Heater Control Circuit Performance. ? P20C2-00 - Reductant Heater 3 Control Circuit Performance. ? P20E9-00 - Reductant Pressure Too High. |
| 18-028-14 | 2018-06-11. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Code(s) may have been set erroneously: ? ? P0045-00 - TURBOCHARGER BOOST CONTROL CIRCUIT/OPEN ? P0087-00 - FUEL RAIL PRESSURE TOO LOW ? P009A-00 - INTAKE AIR TEMPERATURE / AMBIENT AIR TEMPERATURE CORRELATION ? P0128-00 - THERMOSTAT RATIONALITY ? P0234-00 - TURBOCHARGER OVERBOOST CONDITION ? P0420-00 - CATALYST EFFICIENCY (BANK 1) ? P0426-00 - CATALYST TEMPERATURE SENSOR CIRCUIT PERFORMANCE (BANK 1 SENSOR 1) ? P05F8-00 - REDUCTANT HEATER CONTROL MODULE PERFORMANCE ? P050E-00 - COLD START ENGINE EXHAUST TEMPERATURE TOO LOW ? P200A-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 1 ? P200B-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 2 ? P202E-00 - REDUCTANT INJECTION VALVE CIRCUIT PERFORMANCE ? P204F-00 - REDUCTANT SYSTEM PERFORMANCE ? P2080-00 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT PERFORMANCE ? P20BA-00 - REDUCTANT HEATER 1 CONTROL CIRCUIT PERFORMANCE ? P20BE-00 - REDUCTANT PRESSURE LINE HEATER CONTROL CIRCUIT PERFORMANCE ? P20C2-00 - REDUCTANT HEATER 3 CONTROL CIRCUIT PERFORMANCE ? P20E9-00 - REDUCTANT PRESSURE TOO HIGH ? P20EE-00 - SCR NOX CATALYST EFFICIENCY BELOW THRESHOLD BANK 1 ? P225C-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK HIGH ? P225D-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK LOW ? P2453-00 - DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR CIRCUIT PERFORMANCE ? P249C-00 - EXCESSIVE TIME TO ENTER CLOSED LOOP REDUCTANT INJECTION CONTROL ? P24C2-00 - EXHAUST GAS TEMPERATURE MEASUREMENT SYSTEM - MULTIPLE SENSOR CORRELATION BANK 1 ? P24F2-00 - EGR TEMPERATURE/CHARGE AIR COOLER TEMPERATURE CORRELATION ? P2564-00 - TURBOCHARGER POSITION SENSOR C |
| 18-028-14 REV. A | 2018-05-21. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING:COOLING SYSTEM. Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. Some customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Code(s) may have been set erroneously: ? ? P0045-00 - TURBOCHARGER BOOST CONTROL CIRCUIT/OPEN ? P0087-00 - FUEL RAIL PRESSURE TOO LOW ? P009A-00 - INTAKE AIR TEMPERATURE / AMBIENT AIR TEMPERATURE CORRELATION ? P0128-00 - THERMOSTAT RATIONALITY ? P0234-00 - TURBOCHARGER OVERBOOST CONDITION ? P0420-00 - CATALYST EFFICIENCY (BANK 1) ? P0426-00 - CATALYST TEMPERATURE SENSOR CIRCUIT PERFORMANCE (BANK 1 SENSOR 1) ? P05F8-00 - REDUCTANT HEATER CONTROL MODULE PERFORMANCE ? P050E-00 - COLD START ENGINE EXHAUST TEMPERATURE TOO LOW ? P200A-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 1 ? P200B-00 - INTAKE MANIFOLD RUNNER PERFORMANCE - BANK 2 ? P202E-00 - REDUCTANT INJECTION VALVE CIRCUIT PERFORMANCE ? P204F-00 - REDUCTANT SYSTEM PERFORMANCE ? P2080-00 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT PERFORMANCE ? P20BA-00 - REDUCTANT HEATER 1 CONTROL CIRCUIT PERFORMANCE ? P20BE-00 - REDUCTANT PRESSURE LINE HEATER CONTROL CIRCUIT PERFORMANCE ? P20C2-00 - REDUCTANT HEATER 3 CONTROL CIRCUIT PERFORMANCE ? P20E9-00 - REDUCTANT PRESSURE TOO HIGH ? P20EE-00 - SCR NOX CATALYST EFFICIENCY BELOW THRESHOLD BANK 1 ? P225C-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK HIGH ? P225D-00 - NOX SENSOR 1/1 PERFORMANCE - SIGNAL STUCK LOW ? P2453-00 - DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE SENSOR CIRCUIT PERFORMANCE ? P249C-00 - EXCESSIVE TIME TO ENTER CLOSED LOOP REDUCTANT INJECTION CONTROL ? P24C2-00 - EXHAUST GAS TEMPERATURE MEASUREMENT SYSTEM - MULTIPLE SENSOR CORRELATION BANK 1 ? P24F2-00 - EGR TEMPERATURE/CHARGE AIR COOLER TEMPERATURE CORRELATION ? P2564-00 - TURBOCHARGER POSITION SENSOR C |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.