Paccar

PACCAR MX (2004 Emissions) Fault Code: P262B PCI ECU Power Supply – Open Circuit on ECU (D420) Pin (B43) DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None 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

PACCAR MX (2004 Emissions) Fault Code: P268A Fuel Injection Control – Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the fuel injection control is incorrect. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is running. 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:Faulty software. Reprogram ECU.

PACCAR MX (2004 Emissions) Fault Code: P3003 PCI ECU Power Supply – Data Valid but Too Low SET CONDITIONS:The PCI ECU (D420) detects that the power supply has dropped to below 10 V. DIAGNOSTIC CONDITION:This diagnostic runs continuously after starting and running the engine. 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:1. Alternator malfunctioning2. PCI ECU power supply, check:–...

PACCAR MX (2004 Emissions) Fault Code: P30B3 CAN – Message (AT1lG1) Time-Out from NOx Sensor before Catalyst SET CONDITIONS:This DTC is set when the repetition rate of the received CAN message is lower than expected, or when the message is not received at all. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on or when the engine is running. 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...

PACCAR MX (2004 Emissions) Fault Code: P3100 Coolant Pump Speed – Data Valid but Too High, When Low Speed is Requested SET CONDITIONS:The PCI ECU (D420) detects that the coolant pump speed is 250 rpm higher than expected for more than five seconds when the pump is controlled to run at low speed. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the engine is running. 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...