Paccar

PACCAR MX (2004 Emissions) Fault Code: P1497 EGR Valve Position – Incorrect 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: P1498 EGR Valve Position – Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the actual position of the EGR valve deviates too much from the requested position for more than 2 seconds. DIAGNOSTIC CONDITION:This diagnostic runs continuously while the engine is running, except when the engine is running in Engine mode ‘SCR Heating’. 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,...

PACCAR MX (2004 Emissions) Fault Code: P1501 Vehicle Speed Sensor – Current Too Low or Open Circuit on ECU (D420) Pin (B40) 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: P1502 Vehicle Speed Sensor – Data Erratic, Intermittent or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the vehicle speed signal is incorrect. DIAGNOSTIC CONDITION:This diagnostic runs when the vehicle is moving. 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. Vehicle speed sensor2. Vehicle speed sensor wiring3. Vehicle speed sensor pulse wheel ADDITIONAL...

PACCAR MX (2004 Emissions) Fault Code: P1503 Vehicle Speed Sensor – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (B40) 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...