Paccar

PACCAR MX (2004 Emissions) Fault Code: P1704 Lambda – Data Erratic, Intermittent or Incorrect, During Overrun SET CONDITIONS:The PCI ECU (D420) detects that the measured oxygen concentration in the exhaust differs too much from the expected oxygen concentration during coasting (fuel injection cutoff) for more than 2 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is above 1200 rpm and2. During coasting (no fuel injection) and3. When the coolant temperature is above 50°C [122°F] and4. The lambda sensor (F834) is in the operating mode (if applicable). CORRESPONDING OBD READINESS MONITOR:Exhaust gas sensors monitor RESET CONDITION:This DTC changes to inactive...

PACCAR MX (2004 Emissions) Fault Code: P1705 Lambda Response Rate – Too Low SET CONDITIONS:The PCI ECU (D420) detects that the measured oxygen concentration in the exhaust differs too much from the expected oxygen concentration. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is between 1200 and 2100 rpm and2. The coolant temperature is above 50°C [122°F] and3. The lambda sensor (F834) is in the operating mode (if applicable).4. The engine mode is DOC heating or DPF regeneration or SCR heating or SCR high efficiency or standard or protection CORRESPONDING OBD READINESS MONITOR:Exhaust gas sensors monitor RESET CONDITION:This DTC changes...

PACCAR MX (2004 Emissions) Fault Code: P1706 Lambda Response Rate – Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured oxygen concentration in the exhaust differs too much from the expected oxygen concentration. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is between 1200 and 2100 rpm and2. The coolant temperature is above 50°C [122°F] and3. The lambda sensor (F834) is in the operating mode (if applicable).4. The engine mode is DOC heating or DPF regeneration or SCR heating or SCR high efficiency or standard or protection CORRESPONDING OBD READINESS MONITOR:Exhaust gas sensors monitor RESET CONDITION:This DTC changes...

PACCAR MX (2004 Emissions) Fault Code: P1707 Lambda – Data Valid but Too Low SET CONDITIONS:The PCI ECU (D420) detects that the oxygen concentration measured by the lambda sensor is lower than the oxygen concentration measured by the NOx sensor before catalyst for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is between 950 and 2000 rpm and2. When the coolant temperature is above 50°C [122°F] and3. The lambda sensor (F834) is in operating mode4. The NOx sensor before catalyst (F844) is in operating mode5. The engine mode is SCR high efficiency or standard or protection....

PACCAR MX (2004 Emissions) Fault Code: P1708 Lambda – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the oxygen concentration measured by the lambda sensor is higher than the oxygen concentration measured by the NOx sensor before catalyst for more than 40 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is between 950 and 2000 rpm and2. When the coolant temperature is above 50°C [122°F] and3. The lambda sensor (F834) is in operating mode4. The NOx sensor before catalyst (F844) is in operating mode5. The engine mode is SCR high efficiency or standard or protection...