Paccar

PACCAR MX (2004 Emissions) Fault Code: P040B EGR Temperature – Data Erratic, Intermittent or Incorrect, at Ignition On SET CONDITIONS:The PCI ECU (D420) detects that the measured EGR temperature sensor differs more than 3°C [5.4°F] from the average of other temperature sensor readings on the engine for more than 5 seconds (after the ignition has been keyed off for at least 8 hours). DIAGNOSTIC CONDITION:This diagnostic runs:1. When the ignition has been keyed off continuously for at least 8 hours2. Difference between the coolant and ambient temperature is less than 15°C [59°F]3. Ambient temperature is more than -20°C [-4°F] CORRESPONDING...

PACCAR MX (2004 Emissions) Fault Code: P040C EGR Temperature – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C9) SET CONDITIONS:This DTC is set when the ECU detects a lower voltage than expected on the signal or control circuit of the ECU. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. 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 successful–...

PACCAR MX (2004 Emissions) Fault Code: P040D EGR Temperature – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (C9) SET CONDITIONS:This DTC is set when the ECU detects a higher voltage than expected on the signal or control circuit of the ECU. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. 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 successful–...

PACCAR MX (2004 Emissions) Fault Code: P0471 Exhaust Gas Pressure Before Turbine – Data Erratic, Intermittent or Incorrect, at Ignition On SET CONDITIONS:The PCI ECU (D420) detects that the measured pressure before turbine sensor reading differs more than 0.36 bar [5.2 PSI] from the average of other engine pressure sensor readings for more than five seconds. DIAGNOSTIC CONDITION:This diagnostic runs when the ignition is switched on (NO engine start) and the ambient temperature is more than -20°C [-4°F]. 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....

PACCAR MX (2004 Emissions) Fault Code: P0472 Exhaust Gas Pressure Before Turbine – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C83) SET CONDITIONS:This DTC is set when the ECU detects a lower voltage than expected on the signal or control circuit of the ECU. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. 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?–...