Paccar

PACCAR MX (2004 Emissions) Fault Code: U1575 EGR Valve Module Effort – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) receives a CAN message from the EGR valve module (L095) that contains an out-of-range value for the actuator effort. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, 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...

PACCAR MX (2004 Emissions) Fault Code: U1577 BPV Actuator – CAN, Message Time-Out SET CONDITIONS:The PCI ECU (D420) lost communication with the BPV valve actuator. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, 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?– No, repair successful– Yes, repair unsuccessful POSSIBLE CAUSES:1. BPV...

PACCAR MX (2004 Emissions) Fault Code: U1578 BPV Actuator Effort – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) receives a CAN message from the BPV valve actuator that contains an out-of-range value for the actuator effort. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, 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....

PACCAR MX (2004 Emissions) Fault Code: U1579 BPV Actuator Position – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) receives a CAN message from the BPV valve actuator that contains an out-of-range value for the actuator shaft position. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, 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...

PACCAR MX (2004 Emissions) Fault Code: U157A BPV Actuator State – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) receives a CAN message from the BPV valve actuator that contains an out-of-range value for the actuator operating state. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, 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...