Paccar

PACCAR MX (2004 Emissions) Fault Code: U1848 EAS-3 ECU Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the EAS-3 ECU. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive next time the ignition is keyed on and the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back? (Can be pending, inactive or active)– No, repair...

PACCAR MX (2004 Emissions) Fault Code: U1849 NOx Sensor Before Catalyst Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the NOx sensor before catalyst. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive next time the ignition is keyed on and the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back? (Can be pending, inactive...

PACCAR MX (2004 Emissions) Fault Code: U184B CAN – Message (TESTINHB_INF) Time-Out from Aftertreatment System SET CONDITIONS:This DTC is set when the repetition rate of the received CAN message is lower than expected or when the message is not received at all. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on or when the engine is running. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No,...

PACCAR MX (2004 Emissions) Fault Code: U184D CAN Communication – PCI ECU Cannot Start up Communication CORRESPONDING OBD READINESS MONITOR:None REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No, repair successful– Yes, repair unsuccessful

PACCAR MX (2004 Emissions) Fault Code: U184E CAN Communication – Message (PROPB_SW) Not Available, Speed Functions Off Switch from Steering Wheel Switches SET CONDITIONS:This DTC is set when a CAN message is received correctly, but the content (signal value or status) is not available. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No, repair successful– Yes, repair...