Paccar

PACCAR MX (2004 Emissions) Fault Code: P062A Common Rail Pump Unit Control – Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the actual rail pressure is too high for the duration of the pump events of the common rail pump units for more than 4 seconds. DIAGNOSTIC CONDITION:This diagnostic runs when the rail pressure control state is: Pump unit only. 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...

PACCAR MX (2004 Emissions) Fault Code: P062B Internal ECU Injector Power Generation – Voltage Too High SET CONDITIONS:The internal ECU injector power supply voltage is too high. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No, repair successful– Yes, repair unsuccessful POSSIBLE CAUSES:Clear the fault with the diagnostic service tool. If the fault reoccurs after ignition on,...

PACCAR MX (2004 Emissions) Fault Code: P062D Internal ECU Injector Power Generation – Voltage Too Low SET CONDITIONS:The internal ECU injector power supply voltage is too low. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. 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 successful– Yes, repair unsuccessful POSSIBLE CAUSES:Clear the fault with the diagnostic service tool. If the fault reoccurs after ignition on,...

PACCAR MX (2004 Emissions) Fault Code: P0640 Grid Heater Relay – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (C55) SET CONDITIONS:This DTC is set when the ECU detects a higher voltage than expected on pin C55. 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– Yes, repair unsuccessful POSSIBLE CAUSES:1....

PACCAR MX (2004 Emissions) Fault Code: P0650 Malfunction Indicator Lamp (MIl) – Current Too Low or Open Circuit on ECU (D420) Pin (B23) SET CONDITIONS:The PCI ECU (D420) detects an open circuit on the control circuit for activation of the MIL. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on and only when the MIL is not activated. 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?...