Paccar

PACCAR MX (2004 Emissions) Fault Code: P1488 EGR Valve Module – Out of Calibration SET CONDITIONS:The EGR valve module (L095) detects that either:1. The closed (0%) position is out of range or2. An internal check routine of the EGR valve module fails to complete successfully. DIAGNOSTIC CONDITION:This diagnosis runs after the ignition is keyed ON. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to INACTIVE if the fault is no longer detected after a key cycle. REPAIR VERIFICATION:1. Clear the 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: P1489 EGR Valve – Stuck Closed SET CONDITIONS:The PCI ECU (D420) detects that the EGR valve is stuck closed since the EGR pressure difference is more than 0 bar [0 psi] and the EGR valve is commanded open. DIAGNOSTIC CONDITION:This diagnostic runs 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...

PACCAR MX (2004 Emissions) Fault Code: P1490 EGR Gas Flow Detected – While the EGR Valve is Closed SET CONDITIONS:The PCI ECU (D420) detects that a certain level of EGR gas mass flow is present, measured by the EGR pressure difference sensor (F751), while the EGR valve is commanded closed. DIAGNOSTIC CONDITION:This diagnostic runs when the engine is running. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to INACTIVE when the ignition is keyed OFF and ON again and the diagnostic runs and passes. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions...

PACCAR MX (2004 Emissions) Fault Code: P1495 Engine Protection System – Power Derate Active SET CONDITIONS:This DTC is activated when DTC1496 has been active for more than 10 hours of engine operation. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:Perform the ‘EGR derate disable’ procedure with the diagnostic service tool to clear the DTC. 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 ADDITIONAL INFORMATION:IMPORTANT: Do not troubleshoot this DTC since it originates from another active DTC. This DTC activates an...

PACCAR MX (2004 Emissions) Fault Code: P1496 Engine Protection System – Protection Mode, Active SET CONDITIONS:This DTC is activated by another active DTC. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC becomes inactive as soon as the DTC from which it originates becomes inactive. 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 ADDITIONAL INFORMATION:IMPORTANT: Do not diagnose this DTC since it originates from another DTC. 1. Engine mode: ‘Protection mode’ is activated. The EGR valve is closed and no...