P2281 · Manufacturer communications

RAM · 2016-04-08

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. DTCs have been changed from a one trip fault to a two trip fault: · **P0421 - Catalyst 1 Efficiency Below Threshold Bank 1.** · P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF. · P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low. · P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · P2281 - Air Leak Between MAF and Throttle Body. · P218F - Reductant No…

RAM · 2016-04-01

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: · **P218F - Reductant No Flow Detected. · 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). · U110E - Lost Ambient Temperature Message. · P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low. · P2281 - Air Leak Between MAF And…

RAM · 2016-03-30

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. **These DTCs have been changed from a one trip fault to a two trip fault: · P2280 - Air Flow Restriction / Leak Between Air Cleaner And MAF · P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low · P208D - (Diesel Exhaust Fluid) Reductant Pump Control Circuit High** A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation a technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: · **P2281 - Air Leak Between MAF and Throttle Body. · P218F - Reductant No Flow Detected. · P0218 - Transmission High…

RAM · 2015-11-07

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 of 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. ? U1421 - Implausible…

RAM · 2015-11-07

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…

RAM · 2015-11-07

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 the following conditions. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: ? U1A24 - Lost Communication With Ammonia Sensor. 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 -…

RAM · 2015-10-31

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…

RAM · 2015-10-31

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…

RAM · 2015-10-31

Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L Turbo Diesel. These improvements are separated into the following categories. 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 Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Set As A One Trip Fault And Should Be A Two Trip Fault: ? P0201 - P0206 - Fuel Injector…

RAM · 2015-07-25

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 the following conditions. The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: ? U1A24 - Lost Communication With Ammonia Sensor. 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: ? U110E - Lost Ambient Temperature Message. ? P0201 - P0206 - Fuel Injector X Circuit/Open. ? P049D - EGR Control Position Exceeding Learning Limit. ? P0711 - Transmission Temperature Sensor Performance. ? P0712 -…

RAM · 2015-05-20

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 -…

RAM · 2015-05-06

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 of 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. ? U1421 - Implausible Ignition Key Off Time Received. ? P026B - Injection Timing Performance. In addition to addressing the above DTCs, the following powertrain system improvements/enhancements are also included in this software release. ? 68RFE Transmission…

RAM · 2015-02-06

Flash: 6.7L Diagnostic And System Improvements This bulletin involves reprogramming the Engine Control Module (ECM) with the latest available software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. Improvements To Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For The Following Diagnostic Trouble Codes (DTCs): ? U3017 - Control Module Timer/Clock Performance. ? U1421 - Implausible Ignition Key Off Time Received. ? P2281 - Air Leak Between MAF And Throttle Body. Other Software Improvements: ? Fuel Filter Minder calibration changes. ? wiTECH Fuel Pressure Override and Fuel System Run Up test improvements. ? EGR system improvement to help prevent freeze up. ? Diesel Exhaust Fluid (DEF) system…

RAM · 2014-12-20

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 -…

RAM · 2014-12-20

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…

RAM · 2014-12-18

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…

RAM · 2014-12-18

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 -…

RAM · 2014-12-18

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…

RAM · 2014-12-18

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 -…

RAM · 2014-11-14

Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L Turbo Diesel. These improvements are separated into the following categories.Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Set As A One Trip Fault And Should Be A Two Trip Fault: P0201 - P0206 - Fuel Injector X Circuit/Open. U110E - Lost Ambient Temperature Message. P049D - EGR Control Position Exceeded Learning Limit.These DTCs Are Currently Set As A Two Trip Fault And Should Have Been A One Trip Fault: U12A4 - LOST COMMUNICATION WITH AMMONIA…

RAM · 2014-11-14

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. ?…

RAM · 2014-11-14

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…

RAM · 2014-11-14

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…

RAM · 2014-11-14

Flash: 6.7L Diagnostic and System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L Turbo Diesel. These improvements are separated into the following categories.Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination For The Following Diagnostic Trouble Codes (DTCs). These DTCs Are Currently Set As A One Trip Fault And Should Be A Two Trip Fault: P0201 - P0206 - Fuel Injector X Circuit/Open. U110E - Lost Ambient Temperature Message. P049D - EGR Control Position Exceeded Learning Limit.These DTCs Are Currently Set As A Two Trip Fault And Should Have Been A One Trip Fault: U12A4 - LOST COMMUNICATION WITH AMMONIA…

RAM · 2014-11-14

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. *…

RAM · 2014-11-14

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…

RAM · 2014-11-14

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…

RAM · 2014-10-07

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…

RAM · 2014-10-07

Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel.Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: P2281 - Air Leak Between MAF And Throttle Body. U1421 - Implausible Ignition Key Off Time Received. P026B - Injection Timing Performance.Other Software Improvements: Charging system improvements for dual alternator applications. Torque increase to 865 ft/lbs (D2 vehicles equipped with the Aisin transmission sales code DF2 only) Fuel Filter Minder calibration changes. wiTECH Fuel Pressure Override and Fuel…

RAM · 2014-09-04

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 -…