Paccar

PACCAR MX (2004 Emissions) Fault Code: U1850 NOx Sensor after Catalyst Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the NOx sensor after catalyst. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive next time the ignition is keyed on and 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? (Can be pending, inactive...

PACCAR MX (2004 Emissions) Fault Code: U1851 NH3 Sensor Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the NH3 sensor. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. RESET CONDITION:This DTC changes to inactive next time the ignition is keyed on and the fault is no longer detected. POSSIBLE CAUSES:1. No or intermittent CAN communication with the NH3 sensor2. Incorrect type of NH3 sensor installed3. Faulty NH3 sensor ADDITIONAL INFORMATION:When the ignition is keyed on, the PCI ECU (D420) queries the NH3 sensor (F869)...

PACCAR MX (2004 Emissions) Fault Code: U1852 VTG Turbocharger Actuator Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the VTG turbocharger actuator. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, and 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...

PACCAR MX (2004 Emissions) Fault Code: U1853 EGR Valve Module Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the EGR valve module. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, and 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...

PACCAR MX (2004 Emissions) Fault Code: U1854 BPV Actuator Software Verification – Incorrect SET CONDITIONS:The PCI ECU detects that no or an incorrect calibration verification number (CVN) is received from the BPV valve. DIAGNOSTIC CONDITION:This diagnostic runs once when the ignition is keyed on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, and 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?...