Paccar

PACCAR MX (2004 Emissions) Fault Code: P170E NOx Sensor Before Catalyst Response – Incorrect SET CONDITIONS:The PCI ECU (D420) detects that measured engine NOx emissions differ too much from the expected engine NOx emissions during transient operation of the engine (expected decrease of NOx emissions). DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine is running at a steady load and its speed is between 1200 and 1700 rpm and2. The coolant temperature is above 50°C [122°F] and3. The engine mode is DOC heating or DPF regeneration or SCR heating or SCR high efficiency or standard or protection and4. The NOx sensor...

PACCAR MX (2004 Emissions) Fault Code: P170F NOx Concentration Before Catalyst – Data Valid but Too High During Overrun SET CONDITIONS:The PCI ECU (D420) detects that the measured engine NOx emissions are too high for a fuel injection cutout situation for more than 21 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. During coasting (no fuel injection) and2. When the coolant temperature is above 50°C [122°F] and3. The NOx sensor before catalyst (F844) is in the operating mode CORRESPONDING OBD READINESS MONITOR:Exhaust gas sensors monitor RESET CONDITION:This DTC changes to inactive when the fault is no longer detected. IMPORTANT:1. For Eaton Ultrashift transmissions,...

PACCAR MX (2004 Emissions) Fault Code: P1710 NOx Concentration Before Catalyst – Data Valid but Too Low SET CONDITIONS:The PCI ECU (D420) detects that measured engine NOx emissions are lower than the expected engine NOx emissions for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine is running at a steady load and its speed is between 1050 and 1850 rpm and2. When the coolant temperature is above 50°C [122°F] and3. The engine mode is SCR high efficiency or standard or protection and4. The NOx sensor before catalyst (F844) is in operating mode CORRESPONDING OBD READINESS MONITOR:Exhaust gas...

PACCAR MX (2004 Emissions) Fault Code: P1711 NOx Concentration Before Catalyst – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured engine NOx emissions are higher than the expected engine NOx emissions for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine is running at a steady load and its speed is between 1050 and 1850 rpm and2. When the coolant temperature is above 50°C [122°F] and3. The engine mode is SCR high efficiency or standard or protection and4. The NOx sensor before catalyst (F844) is in the operating mode CORRESPONDING OBD READINESS...

PACCAR MX (2004 Emissions) Fault Code: P1717 Exhaust Gas Temperature After BPV – Data Erratic, Intermittent or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the temperature after BPV differs by more than 421°C [790°F] from the temperature before DOC (EAS) for more than 50 seconds. DIAGNOSTIC CONDITION:This diagnostic runs when:1. The engine is running at a steady load and2. The coolant temperature is above 50°C [122°F] and3. The engine mode is SCR high efficiency or standard or protection and4. The fuel dosing valve (EAS) is disabled CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when the fault...