Paccar

PACCAR MX (2004 Emissions) Fault Code: P1722 BPV Control – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the actual BPV valve position measured by the BPV valve actuator differs too much from the commanded position (by the PCI ECU) for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is running. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when 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?...

PACCAR MX (2004 Emissions) Fault Code: P1723 Exhaust Gas Pressure Before Turbine – Data Valid but Too Low SET CONDITIONS:The PCI ECU (D420) detects that measured pressure before turbine is lower than the requested pressure before turbine for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is above 600 rpm and2. When the engine is running at a steady load and3. The [engine mode] is SCR HEATING, SCR HIGH EFFICIENCY, STANDARD or PROTECTION CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to INACTIVE when the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test...

PACCAR MX (2004 Emissions) Fault Code: P1724 Exhaust Gas Pressure Before Turbine – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that measured pressure before turbine is higher than the requested pressure before turbine for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is running at a steady load. CORRESPONDING OBD READINESS MONITOR:VTG monitor RESET CONDITION:This DTC changes to inactive when the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the following conditions:– Corresponding readiness monitor displays ‘Ready’– Diagnostic conditions are met– Set...

PACCAR MX (2004 Emissions) Fault Code: P1726 Exhaust Gas Pressure Before Turbine – Response Too Slow, On Requested Pressure SET CONDITIONS:The PCI ECU (D420) detects a too slow response of the requested pressure before turbine value. DIAGNOSTIC CONDITION:MX-11:This diagnostic runs when the engine is running in engine mode ‘SCR heating’ or ‘SCR super high efficiency’ and the engine speed is more than 1000rpm during normal engine load conditions. MX-13:This diagnostic runs when the engine is running in engine mode ‘SCR super high efficiency’ and the engine speed is more than 1000rpm during normal engine load conditions.’ CORRESPONDING OBD READINESS MONITOR:VTG...

PACCAR MX (2004 Emissions) Fault Code: P1727 VTG Turbocharger Control – Data Erratic, Intermittent or Incorrect IMPORTANT: This DTC can be the result of communication issues on the E-CAN network. If one of the following CAN-related DTCs is present in the DTC history, DO NOT TROUBLESHOOT this DTC:U1011U104CU1159U1835 SET CONDITIONS:The PCI ECU (D420) detects that the actual VTG turbocharger nozzle ring position differs too much from the commanded position (by the PCI ECU) for more than 40 s. DIAGNOSTIC CONDITION:This diagnosis runs when:1. The engine is running at a steady speed and load.2. The engine mode is SCR high efficiency,...