Paccar

PACCAR MX (2004 Emissions) Fault Code: P2229 Internal ECU Ambient Pressure – Malfunction SET CONDITIONS:The PCI ECU (D420) detects that the internal ambient pressure sensor is faulty. 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:Faulty pressure sensor, internally in ECU ADDITIONAL INFORMATION:The PCI ECU has an internal ambient pressure...

PACCAR MX (2004 Emissions) Fault Code: P222C Internal ECU Ambient Pressure – Internal Error SET CONDITIONS:The PCI ECU (D420) detects that the internal ambient pressure sensor is faulty. 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:Faulty pressure sensor, internally in ECU ADDITIONAL INFORMATION:The PCI ECU has an internal ambient...

PACCAR MX (2004 Emissions) Fault Code: P222D Internal ECU Ambient Pressure – Internal Error SET CONDITIONS:The PCI ECU (D420) detects that the internal ambient pressure sensor is faulty. 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:Faulty pressure sensor, internally in ECU ADDITIONAL INFORMATION:The PCI ECU has an internal ambient...

PACCAR MX (2004 Emissions) Fault Code: P2238 Lambda – Current Too Low on ECU (D420) Pin (C45) SET CONDITIONS:The PCI ECU (D420) detects a lower current than expected in the measuring circuit of the lambda sensor. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. POSSIBLE CAUSES:1. Lambda sensor wiring issue2. Lambda sensor failure

PACCAR MX (2004 Emissions) Fault Code: P2239 Lambda – Current Too High on ECU (D420) Pin (C45) SET CONDITIONS:The PCI ECU (D420) detects a higher current than expected in the measuring circuit of the lambda sensor. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes POSSIBLE CAUSES:1. Lambda sensor wiring issue2. Lambda sensor failure