Paccar

PACCAR MX (2004 Emissions) Fault Code: P1228 Injector Solenoid Valve Cylinder 4, 5, or 6 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A11) or Pin (A3) or Pin (A7) SET CONDITIONS:The PCI ECU (D420) detects a too high voltage or a short circuit to supply on the ECU pin A3 or A7 or A11 circuit. 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. To enable the injector output, the DTC must be cleared. REPAIR VERIFICATION:1. Clear...

PACCAR MX (2004 Emissions) Fault Code: P1230 Common Rail Pump Unit 1 – Short Circuit Between ECU (D420) Pin (A25) and Pin (A26) SET CONDITIONS:The PCI ECU (D420) detects a short circuit between ECU pin A25 and pin A26. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition has been switched off for at least 15 seconds and switched 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...

PACCAR MX (2004 Emissions) Fault Code: P1234 Common Rail Pump Unit 2 – Short Circuit Between ECU (D420) Pin (A27) and Pin (A28) SET CONDITIONS:The PCI ECU (D420) detects a short circuit between ECU pin A27 and pin A28. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition has been switched off for at least 15 seconds and switched 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...

PACCAR MX (2004 Emissions) Fault Code: P1235 Turbo Speed – Data Erratic, Intermittent, or Incorrect SET CONDITIONS:The PCI ECU (D420) detects that the measured turbo speed differs too much from the expected turbo speed for more than 120 seconds. DIAGNOSTIC CONDITION:This diagnostic runs when the engine is running at a steady load and the coolant temperature is above 50?C [122?F]. 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...

PACCAR MX (2004 Emissions) Fault Code: P1263 Cylinder 1 – Torque Contribution Too High SET CONDITIONS:The PCI ECU (D420) detects that the combustion contribution of cylinder 1 is higher relative to the other cylinders. DIAGNOSTIC CONDITION:This diagnostic runs when the engine is running at a steady speed and load, and the vehicle speed is steady. CORRESPONDING OBD READINESS MONITOR:Fuel system monitor 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 following conditions:– Corresponding readiness monitor displays ‘Ready’– Diagnostic conditions are met– Set...