Paccar

PACCAR MX (2004 Emissions) Fault Code: P1062 Cruise Control Switches – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that both the cruise control set(+) switch and the res(-) switch are active at the same time. 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:Mechanical failure or...

PACCAR MX (2004 Emissions) Fault Code: P1086 Common Rail Fuel Pressure – Increase Too Slow SET CONDITIONS:The PCI ECU (D420) detects that the actual rail pressure is below 150 bar [2176 psi] for more than 5 seconds. DIAGNOSTIC CONDITION:This diagnostic runs when the rail pressure operating state is: Filling rail (during starting). 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...

PACCAR MX (2004 Emissions) Fault Code: P1087 Fuel Pressure – Data Valid but Too Low, Moderately Severe SET CONDITIONS:The PCI ECU (D420) detects that the fuel pressure is too low for more than 50 seconds. DIAGNOSTIC CONDITION:This diagnostic runs when the engine has been running for more than 200 seconds. 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 fuel...

PACCAR MX (2004 Emissions) Fault Code: P1088 Common Rail Fuel Pressure – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured rail pressure is more than 2840 bar [41191 psi]. DIAGNOSTIC CONDITION:This diagnostic runs when the rail pressure operating state is: Release valve 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 back?– No, repair successful– Yes, repair unsuccessful POSSIBLE CAUSES:Common rail pressure...

PACCAR MX (2004 Emissions) Fault Code: P1089 Common Rail Fuel Pressure – Data Valid but Too High SET CONDITIONS:The PCI ECU (D420) detects that the measured rail pressure is more than 2840 bar [41191 psi]. DIAGNOSTIC CONDITION:This diagnostic runs when the rail pressure operating state is: Pump unit only or Rail discharge. 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...