Paccar

PACCAR MX (2004 Emissions) Fault Code: P104C Inlet Air Pressure in Inlet Manifold – Data Valid but Too Low SET CONDITIONS:The PCI ECU (D420) detects that the measured boost pressure is more than 0.5 bar [7.3 psi] lower than the expected boost pressure for more than 50 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. when the engine is running at a steady load, and2. when the coolant temperature is above 50°C [122°F], and3. when ambient temperature is between -15 and 40°C [5 and 104°F], and;4. The engine mode is SCR high efficiency or standard. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes...

PACCAR MX (2004 Emissions) Fault Code: P104D Exhaust Gas Pressure Before Turbine – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured pressure before turbine is higher than the expected pressure before turbine for more than 50 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. When the engine speed is between 1000 and 1700 rpm and2. When the engine is running at a steady load and3. When the coolant temperature is above 50°C [122°F] and4. The engine mode is SCR high efficiency or standard or protection. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when the...

PACCAR MX (2004 Emissions) Fault Code: P104E Exhaust Gas Pressure Before Turbine – Data Valid but Too Low, During Engine Braking SET CONDITIONS:The PCI ECU (D420) detects that the expected exhaust gas pressure before turbine cannot be reached while the VTG turbocharger is at its minimum position. DIAGNOSTIC CONDITION:This diagnostic runs when the engine mode is engine brake. 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?– No,...

PACCAR MX (2004 Emissions) Fault Code: P1050 Exhaust Gas Pressure After BPV – Data Erratic, Intermittent or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that measured pressure after BPV differs too much from the expected pressure after BPV for more than 50 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. Engine speed is between 1000 and 1700 rpm and2. Engine is running at a steady load and3. Coolant temperature is above 50?C [122?F] and4. The engine mode is SCR high efficiency or standard CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when the fault is no longer detected. REPAIR VERIFICATION:1. Clear...

PACCAR MX (2004 Emissions) Fault Code: P1051 Grid Heater – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the boost temperature has risen less than 40?C [104?F] within 20 seconds after activating the glow installation. DIAGNOSTIC CONDITION:This diagnostic runs once after the ignition is keyed on and when the glow installation is activated. 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?– No, repair...