Paccar

PACCAR MX (2004 Emissions) Fault Code: P1298 Engine Oil Temperature – Data Valid but Too High, Moderately Severe

SET CONDITIONS:
The PCI ECU (D420) detects that measured oil temperature is higher than 125?C [257?F] for more than 60 seconds.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously after ignition is keyed 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:
1. Malfunction on thermostat in oil module
2. Blocked oil cooler
3. Restriction in the cooling circuit to the oil cooler in the engine block/oil module

ADDITIONAL INFORMATION:
1. The oil temperature is monitored by the oil temperature sensor (F808).
2. The yellow warning is activated on the driver’s display.

PACCAR MX (2004 Emissions) Fault Code: P1301 Cylinder 1 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 1, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1302 Cylinder 5 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 5, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1303 Cylinder 3 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 3, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1304 Cylinder 6 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 6, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1305 Cylinder 2 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 2, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1306 Cylinder 4 – Intermittent Misfire

SET CONDITIONS:
This DTC is set when the PCI ECU (D420) detects more than 20 misfires on cylinder 4, within 1000 crankshaft rotations.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the following is true:
1. The coolant temperature is greater than 10?C [50?F] and
2. The engine load is stable and
3. When the engine speed is between 900 and 1650 rpm and
4. No DTCs are present related to fuel pressure, fuel injectors, camshaft, crankshaft, oil and coolant temperature.
5. The amount of injected fuel is between 70 and 220 mg/stroke.

CORRESPONDING OBD READINESS MONITOR:
Misfire monitor

RESET CONDITION:
This DTC will change to inactive after the ignition is keyed OFF and ON again and the diagnostic runs and passes.

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 conditions are met
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
1. Malfunction in the EGR circuit
2. Malfunction in the fuel injection circuit

ADDITIONAL INFORMATION:
This DTC is typically the result of a malfunction in another system or component. If related DTCs are present, troubleshoot these first.

PACCAR MX (2004 Emissions) Fault Code: P1335 Crankshaft Speed Signal – Disturbed or No Signal During Engine Start

SET CONDITIONS:
The PCI ECU (D420) detects that one or more holes in the flywheel are not detected within one crankshaft revolution.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the engine is started.

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. Faulty crankshaft sensor signal
2. Damaged flywheel
3. Faulty crankshaft sensor

ADDITIONAL INFORMATION:
1. Crankshaft sensor (F552) is used to determine the crankshaft speed and position.
2. It is possible that the camshaft sensor (F558) is used as backup to run the engine.
3. Engine torque is reduced.

PACCAR MX (2004 Emissions) Fault Code: P1336 Crankshaft Speed Signal – Out of Range During Engine Start

SET CONDITIONS:
The PCI ECU (D420) detects a high frequency disturbance on the crankshaft signal.

DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the engine is started.

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. Faulty crankshaft sensor signal
2. Damaged flywheel
3. Faulty crankshaft sensor

ADDITIONAL INFORMATION:
1. Crankshaft sensor (F552) is used to determine the crankshaft speed and position. It is possible for the camshaft sensor (F558) to be used as backup to run the engine.
2. Engine torque is reduced.