Paccar

PACCAR MX (2004 Emissions) Fault Code: P1040 Exhaust Gas Pressure after BPV – Data Valid but Too Low SET CONDITIONS:The DTC is set if the pressure after BPV corrected for the ambient pressure is lower than the threshold which is based on the exhaust gas mass flow. DIAGNOSTIC CONDITION:1. The diagnostic runs if all the conditions mentioned in this chapter are met.2. The air pressure sensor after BPV is fitted.3. EGR and BPV are controlled normally.4. No faults present on the pressure sensor after BPV, ambient pressure sensor, pressure sensor before turbine5. Exhaust gas flow rate > 250 g/s6. Time...

PACCAR MX (2004 Emissions) Fault Code: P1042 VTG Turbocharger Control – Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the VTG turbocharger control is limited by the exhaust gas pressure before turbine for more than 300 seconds. DIAGNOSTIC CONDITION:This diagnostic runs:1. Engine speed is between 1050 and 1850 rpm and2. 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 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: P1048 Air Mass Flow – Data Valid but Too High, During Overrun SET CONDITIONS:The VTG turbocharger actuator (L037) detects:1. A difference between the required and actual actuator motor position of more than 8.9% for more than 35 seconds with2. An actuator effort of more than 38% with3. An actuator temperature of more than 5?C DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is in SCR heating mode. RESET CONDITION:This DTC will change to inactive immediately after the diagnostic runs and passes. POSSIBLE CAUSES:1. After an actuator installation: VTG turbocharger actuator initialization procedure was not...

PACCAR MX (2004 Emissions) Fault Code: P1049 Air Mass Flow – Data Valid but Too Low During Overrun SET CONDITIONS:The VTG turbocharger actuator (L037) detects:1. A difference between the required and actual actuator motor position of more than 8.9% for more than 35 seconds with2. An actuator effort of more than 38% with3. An actuator temperature of more than 5?C DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is not in SCR heating mode. RESET CONDITION:This DTC will change to inactive immediately after the diagnostic runs and passes. POSSIBLE CAUSES:1. After an actuator installation: VTG turbocharger actuator initialization procedure was...

PACCAR MX (2004 Emissions) Fault Code: P104B Inlet Air Pressure in Inlet Manifold – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured boost pressure is more than 0.5 bar [7.3 psi] higher 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] and4. The engine mode is SCR high efficiency or standard. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes...