# P026A on the 2013 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 P026A

- [10221090](https://open.wenmarpro.com/bulletins/10221090), 2022-09-26: Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 P0201 \- P0206 \- Fuel Injector X Circuit/Open. P049D \- EGR Control Position Exceeding Learning Limit. P0711 \- Transmission Temperature Sensor Performance. P0712 \- Transmission Temperature Sensor Low. P0713 \- Transmission Temperature Sensor High. P0714 \- Transmission Temperature Sensor Intermittent. P0740 \- TCC Out Of Range. P0869 \- Line Pressure High. P0933 \- Hydraulic Pressure Sensor Range/Performance. P0934 \- Line Pressure Sensor Circuit Low. P0935 \- Line Pressure Sensor Circuit High. P1775 \- Solenoid Switch Valve Latched In TCC Position. P1776 \- Solenoid Switch Valve Latched In LR Position. U0100 \- Lost Communication With ECM/PCM. U0002 \- CAN C Bus Off performance \- Bus Off. U110E \- Lost Ambient Temperature Message.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. P026B \- Injection Timing Performance. P0128 \- Thermostat Rationality. In cold ambient temperatures. P0087 \- Fuel Rail Pressure Too Low. P2281 \- Air Leak Between MAF and Throttle Body. U1421 \- Implausible Ignition Key Off Time Received. P026A \- Charge Air Cooler Efficiency Below Threshold. P04DB \- Crankcase Ventilation System Disconnected. P0544 \- Exhaust Gas Temperature Sensor Circuit \- Bank 1 Sensor 1. P0562 \- Battery Voltage Low. P0604 \- Internal Control Module RAM Error. P1451 \- Diesel Particulate Filter
- [10218803](https://open.wenmarpro.com/bulletins/10218803), 2022-08-29: Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 Transmission Faults. These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 \- P0206 \- FUEL INJECTOR X CIRCUIT/OPEN ? P049D \- EGR CONTROL POSITION EXCEEDED LEARNING LIMIT ? P0711 \- TRANSMISSION TEMPERATURE SENSOR PERFORMANCE ? P0712 \- TRANSMISSION TEMPERATURE SENSOR LOW ? P0713 \- TRANSMISSION TEMPERATURE SENSOR HIGH ? P0714 \- TRANSMISSION TEMPERATURE SENSOR INTERMITTENT ? P0740 \- TCC OUT OF RANGE ? P0869 \- LINE PRESSURE HIGH ? P0933 \- HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE ? P0934 \- LINE PRESSURE SENSOR CIRCUIT LOW ? P0935 \- LINE PRESSURE SENSOR CIRCUIT HIGH ? P1775 \- SOLENOID SWITCH VALVE LATCHED IN TCC POSITION ? P1776 \- SOLENOID SWITCH VALVE LATCHED IN LR POSITION ? U0100 \- LOST COMMUNICATION WITH ECM/PCM ? U0002 \- CAN C BUS OFF PERFORMANCE \- BUS OFF ? U110E \- LOST AMBIENT TEMPERATURE MESSAGE Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P026A \- CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD ? P04DB \- CRANKCASE VENTILATION SYSTEM DISCONNECTED ? P0544 \- EXHAUST GAS TEMPERATURE SENSOR CIRCUIT \- BANK 1 SENSOR 1 ? P0562 \- BATTERY VOLTAGE LOW ? P0604 \- INTERNAL CONTROL MODULE RAM ERROR ? P1451 \- DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE ? P20EE \- SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD \- BANK 1 \(Additional software enhancements to prevent false MIL\) ? P202E \- \(DIESEL EXHAUST FLUID\) REDUCTANT INJECTOR PERFORMANCE ? P2201 \- AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE \- BANK 1 SENSOR 1 ? P2281 \- AIR LEAK BETWEEN MAF AND THROTTLE BODY ? P24A5 \- EGR COO
- [10218207](https://open.wenmarpro.com/bulletins/10218207), 2022-08-22: Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 \(DTCs\). These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 \- P0206 \- Fuel Injector X Circuit/Open. ? P049D \- EGR Control Position Exceeding Learning Limit. ? P0711 \- Transmission Temperature Sensor Performance. ? P0712 \- Transmission Temperature Sensor Low. ? P0713 \- Transmission Temperature Sensor High. ? P0714 \- Transmission Temperature Sensor Intermittent. ? P0740 \- TCC Out Of Range. ? P0869 \- Line Pressure High. ? P0933 \- Hydraulic Pressure Sensor Range/Performance. ? P0934 \- Line Pressure Sensor Circuit Low. ? P0935 \- Line Pressure Sensor Circuit High. ? P1775 \- Solenoid Switch Valve Latched In TCC Position. ? P1776 \- Solenoid Switch Valve Latched In LR Position. ? U0100 \- Lost Communication With ECM/PCM. ? U0002 \- CAN C Bus Off performance \- Bus Off. ? U110E \- Lost Ambient Temperature Message. 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: ? P026B \- Injection Timing Performance. ? P0128 \- Thermostat Rationality. In cold ambient temperatures. ? P0087 \- Fuel Rail Pressure Too Low. ? P2281 \- Air Leak Between MAF and Throttle Body. ? U3017 \- Control Module Timer/Clock Performance. ? U1421 \- Implausible Ignition Key Off Time Received. ? P026A \- Charge Air Cooler Efficiency Below Threshold. ? P04DB \- Crankcase Ventilation System Disconnected. ? P0544 \- Exhaust Gas Temperature Sensor Circuit \- Bank 1 Sensor
- [10217962](https://open.wenmarpro.com/bulletins/10217962), 2022-08-22: Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 Transmission Faults. These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 \- P0206 \- FUEL INJECTOR X CIRCUIT/OPEN ? P049D \- EGR CONTROL POSITION EXCEEDED LEARNING LIMIT ? P0711 \- TRANSMISSION TEMPERATURE SENSOR PERFORMANCE ? P0712 \- TRANSMISSION TEMPERATURE SENSOR LOW ? P0713 \- TRANSMISSION TEMPERATURE SENSOR HIGH ? P0714 \- TRANSMISSION TEMPERATURE SENSOR INTERMITTENT ? P0740 \- TCC OUT OF RANGE ? P0869 \- LINE PRESSURE HIGH ? P0933 \- HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE ? P0934 \- LINE PRESSURE SENSOR CIRCUIT LOW ? P0935 \- LINE PRESSURE SENSOR CIRCUIT HIGH ? P1775 \- SOLENOID SWITCH VALVE LATCHED IN TCC POSITION ? P1776 \- SOLENOID SWITCH VALVE LATCHED IN LR POSITION ? U0100 \- LOST COMMUNICATION WITH ECM/PCM ? U0002 \- CAN C BUS OFF PERFORMANCE \- BUS OFF ? U110E \- LOST AMBIENT TEMPERATURE MESSAGE Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P026A \- CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD ? P04DB \- CRANKCASE VENTILATION SYSTEM DISCONNECTED ? P0544 \- EXHAUST GAS TEMPERATURE SENSOR CIRCUIT \- BANK 1 SENSOR 1 ? P0562 \- BATTERY VOLTAGE LOW ? P0604 \- INTERNAL CONTROL MODULE RAM ERROR ? P1451 \- DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE ? P20EE \- SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD \- BANK 1 \(Additional software enhancements to prevent false MIL\) ? P202E \- \(DIESEL EXHAUST FLUID\) REDUCTANT INJECTOR PERFORMANCE ? P2201 \- AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE \- BANK 1 SENSOR 1 ? P2281 \- AIR LEAK BETWEEN MAF AND THROTTLE BODY ? P24A5 \- EGR COO
- [10189193](https://open.wenmarpro.com/bulletins/10189193), 2021-03-22: Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 Transmission Faults. These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0711 \- TRANSMISSION TEMPERATURE SENSOR PERFORMANCE ? P0712 \- TRANSMISSION TEMPERATURE SENSOR LOW ? P0713 \- TRANSMISSION TEMPERATURE SENSOR HIGH ? P0714 \- TRANSMISSION TEMPERATURE SENSOR INTERMITTENT ? P0740 \- TCC OUT OF RANGE ? P0869 \- LINE PRESSURE HIGH ? P0933 \- HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE ? P0934 \- LINE PRESSURE SENSOR CIRCUIT LOW ? P0935 \- LINE PRESSURE SENSOR CIRCUIT HIGH ? P1775 \- SOLENOID SWITCH VALVE LATCHED IN TCC POSITION ? P1776 \- SOLENOID SWITCH VALVE LATCHED IN LR POSITION ? U0100 \- LOST COMMUNICATION WITH ECM/PCM ? U0002 \- CAN C BUS OFF PERFORMANCE \- BUS OFF Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P026A \- CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD ? P0544 \- EXHAUST GAS TEMPERATURE SENSOR CIRCUIT \- BANK 1 SENSOR 1 ? P0562 \- BATTERY VOLTAGE LOW ? P20EE \- SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD \- BANK 1 ? P2201 \- AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE \- BANK 1 SENSOR 1 ? P2281 \- AIR LEAK BETWEEN MAF AND THROTTLE BODY ? P24A5 \- EGR COOLER BYPASS BANK 1 CONTROL STUCK ? P2459 \- DIESEL PARTICULATE FILTER REGENERATION TOO FREQUENT ? P249E \- CLOSED LOOP SCR REDUCTANT INJECTION CONTROL AT LIMIT \- FLOW TOO HIGH Other Updates: ? With the ignition in the ?Run? position, engine not running, a small number of customers may experience a message in the Vehicle Information Center that states ?Service Exhaust System \- see dealer? erroneously. ? Add engine run time t
- [10139920](https://open.wenmarpro.com/bulletins/10139920), 2018-06-11: Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 P049D\- EGR Control Position Exceeding Learning Limit P0711\- Transmission Temperature Sensor Performance P0712\- Transmission Temperature Sensor Low P0713\- Transmission Temperature Sensor High P0714\- Transmission Temperature Sensor Intermittent P0740\- TCC Out Of Range P0869\- Line Pressure High P0933\- Hydraulic Pressure Sensor Range/Performance P0934\- Line Pressure Sensor Circuit Low P0935\- Line Pressure Sensor Circuit High P1775\- Solenoid Switch Valve Latched In TCC Position P1776\- Solenoid Switch Valve Latched In LR Position U0100\- Lost Communication With ECM/PCM U0002\- CAN C Bus Off performance \- Bus Off U110E\- Lost Ambient Temperature Message.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 P026B\- Injection Timing Performance P0128\- Thermostat Rationality. In cold ambient temperatures P0087\- Fuel Rail Pressure Too Low P2281\- Air Leak Between MAF and Throttle Body U1421\- Implausible Ignition Key Off Time Received P026A\- Charge Air Cooler Efficiency Below Threshold P04DB \- Crankcase Ventilation System Disconnected P0544 \- Exhaust Gas Temperature Sensor Circuit \- Bank 1 Sensor 1 P0562 \- Battery Voltage Low P0604 \- Internal Control Module RAM Error P1451 \- Diesel Particulate Filter
- [10139840](https://open.wenmarpro.com/bulletins/10139840), 2018-06-11: Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 \(DTCs\). These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: \* P0201 \- P0206 \- Fuel Injector X Circuit/Open. \* P049D \- EGR Control Position Exceeding Learning Limit. \* P0711 \- Transmission Temperature Sensor Performance. \* P0712 \- Transmission Temperature Sensor Low. \* P0713 \- Transmission Temperature Sensor High. \* P0714 \- Transmission Temperature Sensor Intermittent. \* P0740 \- TCC Out Of Range. \* P0869 \- Line Pressure High. \* P0933 \- Hydraulic Pressure Sensor Range/Performance. \* P0934 \- Line Pressure Sensor Circuit Low. \* P0935 \- Line Pressure Sensor Circuit High. \* P1775 \- Solenoid Switch Valve Latched In TCC Position. \* P1776 \- Solenoid Switch Valve Latched In LR Position. \* U0100 \- Lost Communication With ECM/PCM. \* U0002 \- CAN C Bus Off performance \- Bus Off. \* U110E \- Lost Ambient Temperature Message. 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: \* P026B \- Injection Timing Performance. \* P0128 \- Thermostat Rationality. In cold ambient temperatures. \* P0087 \- Fuel Rail Pressure Too Low. \* P2281 \- Air Leak Between MAF and Throttle Body. \* U3017 \- Control Module Timer/Clock Performance. \* U1421 \- Implausible Ignition Key Off Time Received. \* P026A \- Charge Air Cooler Efficiency Below Threshold. \* P04DB \- Crankcase Ventilation System Disconnected. \* P0544 \- Exhaust Gas Temperature Sensor Circuit \- Bank 1 Sensor
- [10139637](https://open.wenmarpro.com/bulletins/10139637), 2018-06-11: Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 Transmission Faults. These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0201 \- P0206 \- FUEL INJECTOR X CIRCUIT/OPEN ? P049D \- EGR CONTROL POSITION EXCEEDED LEARNING LIMIT ? P0711 \- TRANSMISSION TEMPERATURE SENSOR PERFORMANCE ? P0712 \- TRANSMISSION TEMPERATURE SENSOR LOW ? P0713 \- TRANSMISSION TEMPERATURE SENSOR HIGH ? P0714 \- TRANSMISSION TEMPERATURE SENSOR INTERMITTENT ? P0740 \- TCC OUT OF RANGE ? P0869 \- LINE PRESSURE HIGH ? P0933 \- HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE ? P0934 \- LINE PRESSURE SENSOR CIRCUIT LOW ? P0935 \- LINE PRESSURE SENSOR CIRCUIT HIGH ? P1775 \- SOLENOID SWITCH VALVE LATCHED IN TCC POSITION ? P1776 \- SOLENOID SWITCH VALVE LATCHED IN LR POSITION ? U0100 \- LOST COMMUNICATION WITH ECM/PCM ? U0002 \- CAN C BUS OFF PERFORMANCE \- BUS OFF ? U110E \- LOST AMBIENT TEMPERATURE MESSAGE Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P026A \- CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD ? P04DB \- CRANKCASE VENTILATION SYSTEM DISCONNECTED ? P0544 \- EXHAUST GAS TEMPERATURE SENSOR CIRCUIT \- BANK 1 SENSOR 1 ? P0562 \- BATTERY VOLTAGE LOW ? P0604 \- INTERNAL CONTROL MODULE RAM ERROR ? P1451 \- DIESEL PARTICULATE FILTER SYSTEM PERFORMANCE ? P20EE \- SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD \- BANK 1 \(Additional software enhancements to prevent false MIL\) ? P202E \- \(DIESEL EXHAUST FLUID\) REDUCTANT INJECTOR PERFORMANCE ? P2201 \- AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE \- BANK 1 SENSOR 1 ? P2281 \- AIR LEAK BETWEEN MAF AND THROTTLE BODY ? P24A5 \- EGR COO
- [10136902](https://open.wenmarpro.com/bulletins/10136902), 2018-05-21: Flash: Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module \(PCM\) 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 Transmission Faults. These Faults Are Currently Tripped As A One Trip Fault And Should Have Been A Two Trip Fault: ? P0711 \- TRANSMISSION TEMPERATURE SENSOR PERFORMANCE ? P0712 \- TRANSMISSION TEMPERATURE SENSOR LOW ? P0713 \- TRANSMISSION TEMPERATURE SENSOR HIGH ? P0714 \- TRANSMISSION TEMPERATURE SENSOR INTERMITTENT ? P0740 \- TCC OUT OF RANGE ? P0869 \- LINE PRESSURE HIGH ? P0933 \- HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE ? P0934 \- LINE PRESSURE SENSOR CIRCUIT LOW ? P0935 \- LINE PRESSURE SENSOR CIRCUIT HIGH ? P1775 \- SOLENOID SWITCH VALVE LATCHED IN TCC POSITION ? P1776 \- SOLENOID SWITCH VALVE LATCHED IN LR POSITION ? U0100 \- LOST COMMUNICATION WITH ECM/PCM ? U0002 \- CAN C BUS OFF PERFORMANCE \- BUS OFF Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp \(MIL\) Illumination For: ? P026A \- CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD ? P0544 \- EXHAUST GAS TEMPERATURE SENSOR CIRCUIT \- BANK 1 SENSOR 1 ? P0562 \- BATTERY VOLTAGE LOW ? P20EE \- SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD \- BANK 1 ? P2201 \- AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE \- BANK 1 SENSOR 1 ? P2281 \- AIR LEAK BETWEEN MAF AND THROTTLE BODY ? P24A5 \- EGR COOLER BYPASS BANK 1 CONTROL STUCK ? P2459 \- DIESEL PARTICULATE FILTER REGENERATION TOO FREQUENT ? P249E \- CLOSED LOOP SCR REDUCTANT INJECTION CONTROL AT LIMIT \- FLOW TOO HIGH Other Updates: ? With the ignition in the ?Run? position, engine not running, a small number of customers may experience a message in the Vehicle Information Center that states ?Service Exhaust System \- see dealer? erroneously. ? Add engine run time t